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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    package org.apache.commons.lang3.reflect;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    import java.lang.reflect.Array;<a name="line.19"></a>
<FONT color="green">020</FONT>    import java.lang.reflect.GenericArrayType;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.lang.reflect.ParameterizedType;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.lang.reflect.Type;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.lang.reflect.TypeVariable;<a name="line.23"></a>
<FONT color="green">024</FONT>    import java.lang.reflect.WildcardType;<a name="line.24"></a>
<FONT color="green">025</FONT>    import java.util.Arrays;<a name="line.25"></a>
<FONT color="green">026</FONT>    import java.util.HashMap;<a name="line.26"></a>
<FONT color="green">027</FONT>    import java.util.HashSet;<a name="line.27"></a>
<FONT color="green">028</FONT>    import java.util.List;<a name="line.28"></a>
<FONT color="green">029</FONT>    import java.util.Map;<a name="line.29"></a>
<FONT color="green">030</FONT>    import java.util.Set;<a name="line.30"></a>
<FONT color="green">031</FONT>    <a name="line.31"></a>
<FONT color="green">032</FONT>    import org.apache.commons.lang3.ClassUtils;<a name="line.32"></a>
<FONT color="green">033</FONT>    <a name="line.33"></a>
<FONT color="green">034</FONT>    /**<a name="line.34"></a>
<FONT color="green">035</FONT>     * &lt;p&gt; Utility methods focusing on type inspection, particularly with regard to<a name="line.35"></a>
<FONT color="green">036</FONT>     * generics. &lt;/p&gt;<a name="line.36"></a>
<FONT color="green">037</FONT>     *<a name="line.37"></a>
<FONT color="green">038</FONT>     * @since 3.0<a name="line.38"></a>
<FONT color="green">039</FONT>     * @version $Id: TypeUtils.java 1144929 2011-07-10 18:26:16Z ggregory $<a name="line.39"></a>
<FONT color="green">040</FONT>     */<a name="line.40"></a>
<FONT color="green">041</FONT>    public class TypeUtils {<a name="line.41"></a>
<FONT color="green">042</FONT>    <a name="line.42"></a>
<FONT color="green">043</FONT>        /**<a name="line.43"></a>
<FONT color="green">044</FONT>         * &lt;p&gt; TypeUtils instances should NOT be constructed in standard<a name="line.44"></a>
<FONT color="green">045</FONT>         * programming. Instead, the class should be used as<a name="line.45"></a>
<FONT color="green">046</FONT>         * &lt;code&gt;TypeUtils.isAssignable(cls, toClass)&lt;/code&gt;. &lt;/p&gt; &lt;p&gt; This<a name="line.46"></a>
<FONT color="green">047</FONT>         * constructor is public to permit tools that require a JavaBean instance to<a name="line.47"></a>
<FONT color="green">048</FONT>         * operate. &lt;/p&gt;<a name="line.48"></a>
<FONT color="green">049</FONT>         */<a name="line.49"></a>
<FONT color="green">050</FONT>        public TypeUtils() {<a name="line.50"></a>
<FONT color="green">051</FONT>            super();<a name="line.51"></a>
<FONT color="green">052</FONT>        }<a name="line.52"></a>
<FONT color="green">053</FONT>    <a name="line.53"></a>
<FONT color="green">054</FONT>        /**<a name="line.54"></a>
<FONT color="green">055</FONT>         * &lt;p&gt; Checks if the subject type may be implicitly cast to the target type<a name="line.55"></a>
<FONT color="green">056</FONT>         * following the Java generics rules. If both types are {@link Class}<a name="line.56"></a>
<FONT color="green">057</FONT>         * objects, the method returns the result of<a name="line.57"></a>
<FONT color="green">058</FONT>         * {@link ClassUtils#isAssignable(Class, Class)}. &lt;/p&gt;<a name="line.58"></a>
<FONT color="green">059</FONT>         *<a name="line.59"></a>
<FONT color="green">060</FONT>         * @param type the subject type to be assigned to the target type<a name="line.60"></a>
<FONT color="green">061</FONT>         * @param toType the target type<a name="line.61"></a>
<FONT color="green">062</FONT>         * @return &lt;code&gt;true&lt;/code&gt; if &lt;code&gt;type&lt;/code&gt; is assignable to &lt;code&gt;toType&lt;/code&gt;.<a name="line.62"></a>
<FONT color="green">063</FONT>         */<a name="line.63"></a>
<FONT color="green">064</FONT>        public static boolean isAssignable(Type type, Type toType) {<a name="line.64"></a>
<FONT color="green">065</FONT>            return isAssignable(type, toType, null);<a name="line.65"></a>
<FONT color="green">066</FONT>        }<a name="line.66"></a>
<FONT color="green">067</FONT>    <a name="line.67"></a>
<FONT color="green">068</FONT>        /**<a name="line.68"></a>
<FONT color="green">069</FONT>         * &lt;p&gt; Checks if the subject type may be implicitly cast to the target type<a name="line.69"></a>
<FONT color="green">070</FONT>         * following the Java generics rules. &lt;/p&gt;<a name="line.70"></a>
<FONT color="green">071</FONT>         *<a name="line.71"></a>
<FONT color="green">072</FONT>         * @param type the subject type to be assigned to the target type<a name="line.72"></a>
<FONT color="green">073</FONT>         * @param toType the target type<a name="line.73"></a>
<FONT color="green">074</FONT>         * @param typeVarAssigns optional map of type variable assignments<a name="line.74"></a>
<FONT color="green">075</FONT>         * @return &lt;code&gt;true&lt;/code&gt; if &lt;code&gt;type&lt;/code&gt; is assignable to &lt;code&gt;toType&lt;/code&gt;.<a name="line.75"></a>
<FONT color="green">076</FONT>         */<a name="line.76"></a>
<FONT color="green">077</FONT>        private static boolean isAssignable(Type type, Type toType,<a name="line.77"></a>
<FONT color="green">078</FONT>                Map&lt;TypeVariable&lt;?&gt;, Type&gt; typeVarAssigns) {<a name="line.78"></a>
<FONT color="green">079</FONT>            if (toType == null || toType instanceof Class&lt;?&gt;) {<a name="line.79"></a>
<FONT color="green">080</FONT>                return isAssignable(type, (Class&lt;?&gt;) toType);<a name="line.80"></a>
<FONT color="green">081</FONT>            }<a name="line.81"></a>
<FONT color="green">082</FONT>    <a name="line.82"></a>
<FONT color="green">083</FONT>            if (toType instanceof ParameterizedType) {<a name="line.83"></a>
<FONT color="green">084</FONT>                return isAssignable(type, (ParameterizedType) toType, typeVarAssigns);<a name="line.84"></a>
<FONT color="green">085</FONT>            }<a name="line.85"></a>
<FONT color="green">086</FONT>    <a name="line.86"></a>
<FONT color="green">087</FONT>            if (toType instanceof GenericArrayType) {<a name="line.87"></a>
<FONT color="green">088</FONT>                return isAssignable(type, (GenericArrayType) toType, typeVarAssigns);<a name="line.88"></a>
<FONT color="green">089</FONT>            }<a name="line.89"></a>
<FONT color="green">090</FONT>    <a name="line.90"></a>
<FONT color="green">091</FONT>            if (toType instanceof WildcardType) {<a name="line.91"></a>
<FONT color="green">092</FONT>                return isAssignable(type, (WildcardType) toType, typeVarAssigns);<a name="line.92"></a>
<FONT color="green">093</FONT>            }<a name="line.93"></a>
<FONT color="green">094</FONT>    <a name="line.94"></a>
<FONT color="green">095</FONT>            // *<a name="line.95"></a>
<FONT color="green">096</FONT>            if (toType instanceof TypeVariable&lt;?&gt;) {<a name="line.96"></a>
<FONT color="green">097</FONT>                return isAssignable(type, (TypeVariable&lt;?&gt;) toType, typeVarAssigns);<a name="line.97"></a>
<FONT color="green">098</FONT>            }<a name="line.98"></a>
<FONT color="green">099</FONT>            // */<a name="line.99"></a>
<FONT color="green">100</FONT>    <a name="line.100"></a>
<FONT color="green">101</FONT>            throw new IllegalStateException("found an unhandled type: " + toType);<a name="line.101"></a>
<FONT color="green">102</FONT>        }<a name="line.102"></a>
<FONT color="green">103</FONT>    <a name="line.103"></a>
<FONT color="green">104</FONT>        /**<a name="line.104"></a>
<FONT color="green">105</FONT>         * &lt;p&gt; Checks if the subject type may be implicitly cast to the target class<a name="line.105"></a>
<FONT color="green">106</FONT>         * following the Java generics rules. &lt;/p&gt;<a name="line.106"></a>
<FONT color="green">107</FONT>         *<a name="line.107"></a>
<FONT color="green">108</FONT>         * @param type the subject type to be assigned to the target type<a name="line.108"></a>
<FONT color="green">109</FONT>         * @param toClass the target class<a name="line.109"></a>
<FONT color="green">110</FONT>         * @return true if &lt;code&gt;type&lt;/code&gt; is assignable to &lt;code&gt;toClass&lt;/code&gt;.<a name="line.110"></a>
<FONT color="green">111</FONT>         */<a name="line.111"></a>
<FONT color="green">112</FONT>        private static boolean isAssignable(Type type, Class&lt;?&gt; toClass) {<a name="line.112"></a>
<FONT color="green">113</FONT>            if (type == null) {<a name="line.113"></a>
<FONT color="green">114</FONT>                // consistency with ClassUtils.isAssignable() behavior<a name="line.114"></a>
<FONT color="green">115</FONT>                return toClass == null || !toClass.isPrimitive();<a name="line.115"></a>
<FONT color="green">116</FONT>            }<a name="line.116"></a>
<FONT color="green">117</FONT>    <a name="line.117"></a>
<FONT color="green">118</FONT>            // only a null type can be assigned to null type which<a name="line.118"></a>
<FONT color="green">119</FONT>            // would have cause the previous to return true<a name="line.119"></a>
<FONT color="green">120</FONT>            if (toClass == null) {<a name="line.120"></a>
<FONT color="green">121</FONT>                return false;<a name="line.121"></a>
<FONT color="green">122</FONT>            }<a name="line.122"></a>
<FONT color="green">123</FONT>    <a name="line.123"></a>
<FONT color="green">124</FONT>            // all types are assignable to themselves<a name="line.124"></a>
<FONT color="green">125</FONT>            if (toClass.equals(type)) {<a name="line.125"></a>
<FONT color="green">126</FONT>                return true;<a name="line.126"></a>
<FONT color="green">127</FONT>            }<a name="line.127"></a>
<FONT color="green">128</FONT>    <a name="line.128"></a>
<FONT color="green">129</FONT>            if (type instanceof Class&lt;?&gt;) {<a name="line.129"></a>
<FONT color="green">130</FONT>                // just comparing two classes<a name="line.130"></a>
<FONT color="green">131</FONT>                return ClassUtils.isAssignable((Class&lt;?&gt;) type, toClass);<a name="line.131"></a>
<FONT color="green">132</FONT>            }<a name="line.132"></a>
<FONT color="green">133</FONT>    <a name="line.133"></a>
<FONT color="green">134</FONT>            if (type instanceof ParameterizedType) {<a name="line.134"></a>
<FONT color="green">135</FONT>                // only have to compare the raw type to the class<a name="line.135"></a>
<FONT color="green">136</FONT>                return isAssignable(getRawType((ParameterizedType) type), toClass);<a name="line.136"></a>
<FONT color="green">137</FONT>            }<a name="line.137"></a>
<FONT color="green">138</FONT>    <a name="line.138"></a>
<FONT color="green">139</FONT>            // *<a name="line.139"></a>
<FONT color="green">140</FONT>            if (type instanceof TypeVariable&lt;?&gt;) {<a name="line.140"></a>
<FONT color="green">141</FONT>                // if any of the bounds are assignable to the class, then the<a name="line.141"></a>
<FONT color="green">142</FONT>                // type is assignable to the class.<a name="line.142"></a>
<FONT color="green">143</FONT>                for (Type bound : ((TypeVariable&lt;?&gt;) type).getBounds()) {<a name="line.143"></a>
<FONT color="green">144</FONT>                    if (isAssignable(bound, toClass)) {<a name="line.144"></a>
<FONT color="green">145</FONT>                        return true;<a name="line.145"></a>
<FONT color="green">146</FONT>                    }<a name="line.146"></a>
<FONT color="green">147</FONT>                }<a name="line.147"></a>
<FONT color="green">148</FONT>    <a name="line.148"></a>
<FONT color="green">149</FONT>                return false;<a name="line.149"></a>
<FONT color="green">150</FONT>            }<a name="line.150"></a>
<FONT color="green">151</FONT>    <a name="line.151"></a>
<FONT color="green">152</FONT>            // the only classes to which a generic array type can be assigned<a name="line.152"></a>
<FONT color="green">153</FONT>            // are class Object and array classes<a name="line.153"></a>
<FONT color="green">154</FONT>            if (type instanceof GenericArrayType) {<a name="line.154"></a>
<FONT color="green">155</FONT>                return toClass.equals(Object.class)<a name="line.155"></a>
<FONT color="green">156</FONT>                        || toClass.isArray()<a name="line.156"></a>
<FONT color="green">157</FONT>                        &amp;&amp; isAssignable(((GenericArrayType) type).getGenericComponentType(), toClass<a name="line.157"></a>
<FONT color="green">158</FONT>                                .getComponentType());<a name="line.158"></a>
<FONT color="green">159</FONT>            }<a name="line.159"></a>
<FONT color="green">160</FONT>    <a name="line.160"></a>
<FONT color="green">161</FONT>            // wildcard types are not assignable to a class (though one would think<a name="line.161"></a>
<FONT color="green">162</FONT>            // "? super Object" would be assignable to Object)<a name="line.162"></a>
<FONT color="green">163</FONT>            if (type instanceof WildcardType) {<a name="line.163"></a>
<FONT color="green">164</FONT>                return false;<a name="line.164"></a>
<FONT color="green">165</FONT>            }<a name="line.165"></a>
<FONT color="green">166</FONT>    <a name="line.166"></a>
<FONT color="green">167</FONT>            throw new IllegalStateException("found an unhandled type: " + type);<a name="line.167"></a>
<FONT color="green">168</FONT>        }<a name="line.168"></a>
<FONT color="green">169</FONT>    <a name="line.169"></a>
<FONT color="green">170</FONT>        /**<a name="line.170"></a>
<FONT color="green">171</FONT>         * &lt;p&gt; Checks if the subject type may be implicitly cast to the target<a name="line.171"></a>
<FONT color="green">172</FONT>         * parameterized type following the Java generics rules. &lt;/p&gt;<a name="line.172"></a>
<FONT color="green">173</FONT>         *<a name="line.173"></a>
<FONT color="green">174</FONT>         * @param type the subject type to be assigned to the target type<a name="line.174"></a>
<FONT color="green">175</FONT>         * @param toParameterizedType the target parameterized type<a name="line.175"></a>
<FONT color="green">176</FONT>         * @param typeVarAssigns a map with type variables<a name="line.176"></a>
<FONT color="green">177</FONT>         * @return true if &lt;code&gt;type&lt;/code&gt; is assignable to &lt;code&gt;toType&lt;/code&gt;.<a name="line.177"></a>
<FONT color="green">178</FONT>         */<a name="line.178"></a>
<FONT color="green">179</FONT>        private static boolean isAssignable(Type type, ParameterizedType toParameterizedType,<a name="line.179"></a>
<FONT color="green">180</FONT>                Map&lt;TypeVariable&lt;?&gt;, Type&gt; typeVarAssigns) {<a name="line.180"></a>
<FONT color="green">181</FONT>            if (type == null) {<a name="line.181"></a>
<FONT color="green">182</FONT>                return true;<a name="line.182"></a>
<FONT color="green">183</FONT>            }<a name="line.183"></a>
<FONT color="green">184</FONT>    <a name="line.184"></a>
<FONT color="green">185</FONT>            // only a null type can be assigned to null type which<a name="line.185"></a>
<FONT color="green">186</FONT>            // would have cause the previous to return true<a name="line.186"></a>
<FONT color="green">187</FONT>            if (toParameterizedType == null) {<a name="line.187"></a>
<FONT color="green">188</FONT>                return false;<a name="line.188"></a>
<FONT color="green">189</FONT>            }<a name="line.189"></a>
<FONT color="green">190</FONT>    <a name="line.190"></a>
<FONT color="green">191</FONT>            // all types are assignable to themselves<a name="line.191"></a>
<FONT color="green">192</FONT>            if (toParameterizedType.equals(type)) {<a name="line.192"></a>
<FONT color="green">193</FONT>                return true;<a name="line.193"></a>
<FONT color="green">194</FONT>            }<a name="line.194"></a>
<FONT color="green">195</FONT>    <a name="line.195"></a>
<FONT color="green">196</FONT>            // get the target type's raw type<a name="line.196"></a>
<FONT color="green">197</FONT>            Class&lt;?&gt; toClass = getRawType(toParameterizedType);<a name="line.197"></a>
<FONT color="green">198</FONT>            // get the subject type's type arguments including owner type arguments<a name="line.198"></a>
<FONT color="green">199</FONT>            // and supertype arguments up to and including the target class.<a name="line.199"></a>
<FONT color="green">200</FONT>            Map&lt;TypeVariable&lt;?&gt;, Type&gt; fromTypeVarAssigns = getTypeArguments(type, toClass, null);<a name="line.200"></a>
<FONT color="green">201</FONT>    <a name="line.201"></a>
<FONT color="green">202</FONT>            // null means the two types are not compatible<a name="line.202"></a>
<FONT color="green">203</FONT>            if (fromTypeVarAssigns == null) {<a name="line.203"></a>
<FONT color="green">204</FONT>                return false;<a name="line.204"></a>
<FONT color="green">205</FONT>            }<a name="line.205"></a>
<FONT color="green">206</FONT>    <a name="line.206"></a>
<FONT color="green">207</FONT>            // compatible types, but there's no type arguments. this is equivalent<a name="line.207"></a>
<FONT color="green">208</FONT>            // to comparing Map&lt; ?, ? &gt; to Map, and raw types are always assignable<a name="line.208"></a>
<FONT color="green">209</FONT>            // to parameterized types.<a name="line.209"></a>
<FONT color="green">210</FONT>            if (fromTypeVarAssigns.isEmpty()) {<a name="line.210"></a>
<FONT color="green">211</FONT>                return true;<a name="line.211"></a>
<FONT color="green">212</FONT>            }<a name="line.212"></a>
<FONT color="green">213</FONT>    <a name="line.213"></a>
<FONT color="green">214</FONT>            // get the target type's type arguments including owner type arguments<a name="line.214"></a>
<FONT color="green">215</FONT>            Map&lt;TypeVariable&lt;?&gt;, Type&gt; toTypeVarAssigns = getTypeArguments(toParameterizedType,<a name="line.215"></a>
<FONT color="green">216</FONT>                    toClass, typeVarAssigns);<a name="line.216"></a>
<FONT color="green">217</FONT>    <a name="line.217"></a>
<FONT color="green">218</FONT>            // now to check each type argument<a name="line.218"></a>
<FONT color="green">219</FONT>            for (Map.Entry&lt;TypeVariable&lt;?&gt;, Type&gt; entry : toTypeVarAssigns.entrySet()) {<a name="line.219"></a>
<FONT color="green">220</FONT>                Type toTypeArg = entry.getValue();<a name="line.220"></a>
<FONT color="green">221</FONT>                Type fromTypeArg = fromTypeVarAssigns.get(entry.getKey());<a name="line.221"></a>
<FONT color="green">222</FONT>    <a name="line.222"></a>
<FONT color="green">223</FONT>                // parameters must either be absent from the subject type, within<a name="line.223"></a>
<FONT color="green">224</FONT>                // the bounds of the wildcard type, or be an exact match to the<a name="line.224"></a>
<FONT color="green">225</FONT>                // parameters of the target type.<a name="line.225"></a>
<FONT color="green">226</FONT>                if (fromTypeArg != null<a name="line.226"></a>
<FONT color="green">227</FONT>                        &amp;&amp; !toTypeArg.equals(fromTypeArg)<a name="line.227"></a>
<FONT color="green">228</FONT>                        &amp;&amp; !(toTypeArg instanceof WildcardType &amp;&amp; isAssignable(fromTypeArg, toTypeArg,<a name="line.228"></a>
<FONT color="green">229</FONT>                                typeVarAssigns))) {<a name="line.229"></a>
<FONT color="green">230</FONT>                    return false;<a name="line.230"></a>
<FONT color="green">231</FONT>                }<a name="line.231"></a>
<FONT color="green">232</FONT>            }<a name="line.232"></a>
<FONT color="green">233</FONT>    <a name="line.233"></a>
<FONT color="green">234</FONT>            return true;<a name="line.234"></a>
<FONT color="green">235</FONT>        }<a name="line.235"></a>
<FONT color="green">236</FONT>    <a name="line.236"></a>
<FONT color="green">237</FONT>        /**<a name="line.237"></a>
<FONT color="green">238</FONT>         * &lt;p&gt; Checks if the subject type may be implicitly cast to the target<a name="line.238"></a>
<FONT color="green">239</FONT>         * generic array type following the Java generics rules. &lt;/p&gt;<a name="line.239"></a>
<FONT color="green">240</FONT>         *<a name="line.240"></a>
<FONT color="green">241</FONT>         * @param type the subject type to be assigned to the target type<a name="line.241"></a>
<FONT color="green">242</FONT>         * @param toGenericArrayType the target generic array type<a name="line.242"></a>
<FONT color="green">243</FONT>         * @param typeVarAssigns a map with type variables<a name="line.243"></a>
<FONT color="green">244</FONT>         * @return true if &lt;code&gt;type&lt;/code&gt; is assignable to<a name="line.244"></a>
<FONT color="green">245</FONT>         * &lt;code&gt;toGenericArrayType&lt;/code&gt;.<a name="line.245"></a>
<FONT color="green">246</FONT>         */<a name="line.246"></a>
<FONT color="green">247</FONT>        private static boolean isAssignable(Type type, GenericArrayType toGenericArrayType,<a name="line.247"></a>
<FONT color="green">248</FONT>                Map&lt;TypeVariable&lt;?&gt;, Type&gt; typeVarAssigns) {<a name="line.248"></a>
<FONT color="green">249</FONT>            if (type == null) {<a name="line.249"></a>
<FONT color="green">250</FONT>                return true;<a name="line.250"></a>
<FONT color="green">251</FONT>            }<a name="line.251"></a>
<FONT color="green">252</FONT>    <a name="line.252"></a>
<FONT color="green">253</FONT>            // only a null type can be assigned to null type which<a name="line.253"></a>
<FONT color="green">254</FONT>            // would have cause the previous to return true<a name="line.254"></a>
<FONT color="green">255</FONT>            if (toGenericArrayType == null) {<a name="line.255"></a>
<FONT color="green">256</FONT>                return false;<a name="line.256"></a>
<FONT color="green">257</FONT>            }<a name="line.257"></a>
<FONT color="green">258</FONT>    <a name="line.258"></a>
<FONT color="green">259</FONT>            // all types are assignable to themselves<a name="line.259"></a>
<FONT color="green">260</FONT>            if (toGenericArrayType.equals(type)) {<a name="line.260"></a>
<FONT color="green">261</FONT>                return true;<a name="line.261"></a>
<FONT color="green">262</FONT>            }<a name="line.262"></a>
<FONT color="green">263</FONT>    <a name="line.263"></a>
<FONT color="green">264</FONT>            Type toComponentType = toGenericArrayType.getGenericComponentType();<a name="line.264"></a>
<FONT color="green">265</FONT>    <a name="line.265"></a>
<FONT color="green">266</FONT>            if (type instanceof Class&lt;?&gt;) {<a name="line.266"></a>
<FONT color="green">267</FONT>                Class&lt;?&gt; cls = (Class&lt;?&gt;) type;<a name="line.267"></a>
<FONT color="green">268</FONT>    <a name="line.268"></a>
<FONT color="green">269</FONT>                // compare the component types<a name="line.269"></a>
<FONT color="green">270</FONT>                return cls.isArray()<a name="line.270"></a>
<FONT color="green">271</FONT>                        &amp;&amp; isAssignable(cls.getComponentType(), toComponentType, typeVarAssigns);<a name="line.271"></a>
<FONT color="green">272</FONT>            }<a name="line.272"></a>
<FONT color="green">273</FONT>    <a name="line.273"></a>
<FONT color="green">274</FONT>            if (type instanceof GenericArrayType) {<a name="line.274"></a>
<FONT color="green">275</FONT>                // compare the component types<a name="line.275"></a>
<FONT color="green">276</FONT>                return isAssignable(((GenericArrayType) type).getGenericComponentType(),<a name="line.276"></a>
<FONT color="green">277</FONT>                        toComponentType, typeVarAssigns);<a name="line.277"></a>
<FONT color="green">278</FONT>            }<a name="line.278"></a>
<FONT color="green">279</FONT>    <a name="line.279"></a>
<FONT color="green">280</FONT>            if (type instanceof WildcardType) {<a name="line.280"></a>
<FONT color="green">281</FONT>                // so long as one of the upper bounds is assignable, it's good<a name="line.281"></a>
<FONT color="green">282</FONT>                for (Type bound : getImplicitUpperBounds((WildcardType) type)) {<a name="line.282"></a>
<FONT color="green">283</FONT>                    if (isAssignable(bound, toGenericArrayType)) {<a name="line.283"></a>
<FONT color="green">284</FONT>                        return true;<a name="line.284"></a>
<FONT color="green">285</FONT>                    }<a name="line.285"></a>
<FONT color="green">286</FONT>                }<a name="line.286"></a>
<FONT color="green">287</FONT>    <a name="line.287"></a>
<FONT color="green">288</FONT>                return false;<a name="line.288"></a>
<FONT color="green">289</FONT>            }<a name="line.289"></a>
<FONT color="green">290</FONT>    <a name="line.290"></a>
<FONT color="green">291</FONT>            if (type instanceof TypeVariable&lt;?&gt;) {<a name="line.291"></a>
<FONT color="green">292</FONT>                // probably should remove the following logic and just return false.<a name="line.292"></a>
<FONT color="green">293</FONT>                // type variables cannot specify arrays as bounds.<a name="line.293"></a>
<FONT color="green">294</FONT>                for (Type bound : getImplicitBounds((TypeVariable&lt;?&gt;) type)) {<a name="line.294"></a>
<FONT color="green">295</FONT>                    if (isAssignable(bound, toGenericArrayType)) {<a name="line.295"></a>
<FONT color="green">296</FONT>                        return true;<a name="line.296"></a>
<FONT color="green">297</FONT>                    }<a name="line.297"></a>
<FONT color="green">298</FONT>                }<a name="line.298"></a>
<FONT color="green">299</FONT>    <a name="line.299"></a>
<FONT color="green">300</FONT>                return false;<a name="line.300"></a>
<FONT color="green">301</FONT>            }<a name="line.301"></a>
<FONT color="green">302</FONT>    <a name="line.302"></a>
<FONT color="green">303</FONT>            if (type instanceof ParameterizedType) {<a name="line.303"></a>
<FONT color="green">304</FONT>                // the raw type of a parameterized type is never an array or<a name="line.304"></a>
<FONT color="green">305</FONT>                // generic array, otherwise the declaration would look like this:<a name="line.305"></a>
<FONT color="green">306</FONT>                // Collection[]&lt; ? extends String &gt; collection;<a name="line.306"></a>
<FONT color="green">307</FONT>                return false;<a name="line.307"></a>
<FONT color="green">308</FONT>            }<a name="line.308"></a>
<FONT color="green">309</FONT>    <a name="line.309"></a>
<FONT color="green">310</FONT>            throw new IllegalStateException("found an unhandled type: " + type);<a name="line.310"></a>
<FONT color="green">311</FONT>        }<a name="line.311"></a>
<FONT color="green">312</FONT>    <a name="line.312"></a>
<FONT color="green">313</FONT>        /**<a name="line.313"></a>
<FONT color="green">314</FONT>         * &lt;p&gt; Checks if the subject type may be implicitly cast to the target<a name="line.314"></a>
<FONT color="green">315</FONT>         * wildcard type following the Java generics rules. &lt;/p&gt;<a name="line.315"></a>
<FONT color="green">316</FONT>         *<a name="line.316"></a>
<FONT color="green">317</FONT>         * @param type the subject type to be assigned to the target type<a name="line.317"></a>
<FONT color="green">318</FONT>         * @param toWildcardType the target wildcard type<a name="line.318"></a>
<FONT color="green">319</FONT>         * @param typeVarAssigns a map with type variables<a name="line.319"></a>
<FONT color="green">320</FONT>         * @return true if &lt;code&gt;type&lt;/code&gt; is assignable to<a name="line.320"></a>
<FONT color="green">321</FONT>         * &lt;code&gt;toWildcardType&lt;/code&gt;.<a name="line.321"></a>
<FONT color="green">322</FONT>         */<a name="line.322"></a>
<FONT color="green">323</FONT>        private static boolean isAssignable(Type type, WildcardType toWildcardType,<a name="line.323"></a>
<FONT color="green">324</FONT>                Map&lt;TypeVariable&lt;?&gt;, Type&gt; typeVarAssigns) {<a name="line.324"></a>
<FONT color="green">325</FONT>            if (type == null) {<a name="line.325"></a>
<FONT color="green">326</FONT>                return true;<a name="line.326"></a>
<FONT color="green">327</FONT>            }<a name="line.327"></a>
<FONT color="green">328</FONT>    <a name="line.328"></a>
<FONT color="green">329</FONT>            // only a null type can be assigned to null type which<a name="line.329"></a>
<FONT color="green">330</FONT>            // would have cause the previous to return true<a name="line.330"></a>
<FONT color="green">331</FONT>            if (toWildcardType == null) {<a name="line.331"></a>
<FONT color="green">332</FONT>                return false;<a name="line.332"></a>
<FONT color="green">333</FONT>            }<a name="line.333"></a>
<FONT color="green">334</FONT>    <a name="line.334"></a>
<FONT color="green">335</FONT>            // all types are assignable to themselves<a name="line.335"></a>
<FONT color="green">336</FONT>            if (toWildcardType.equals(type)) {<a name="line.336"></a>
<FONT color="green">337</FONT>                return true;<a name="line.337"></a>
<FONT color="green">338</FONT>            }<a name="line.338"></a>
<FONT color="green">339</FONT>    <a name="line.339"></a>
<FONT color="green">340</FONT>            Type[] toUpperBounds = getImplicitUpperBounds(toWildcardType);<a name="line.340"></a>
<FONT color="green">341</FONT>            Type[] toLowerBounds = getImplicitLowerBounds(toWildcardType);<a name="line.341"></a>
<FONT color="green">342</FONT>    <a name="line.342"></a>
<FONT color="green">343</FONT>            if (type instanceof WildcardType) {<a name="line.343"></a>
<FONT color="green">344</FONT>                WildcardType wildcardType = (WildcardType) type;<a name="line.344"></a>
<FONT color="green">345</FONT>                Type[] upperBounds = getImplicitUpperBounds(wildcardType);<a name="line.345"></a>
<FONT color="green">346</FONT>                Type[] lowerBounds = getImplicitLowerBounds(wildcardType);<a name="line.346"></a>
<FONT color="green">347</FONT>    <a name="line.347"></a>
<FONT color="green">348</FONT>                for (Type toBound : toUpperBounds) {<a name="line.348"></a>
<FONT color="green">349</FONT>                    // if there are assignments for unresolved type variables,<a name="line.349"></a>
<FONT color="green">350</FONT>                    // now's the time to substitute them.<a name="line.350"></a>
<FONT color="green">351</FONT>                    toBound = substituteTypeVariables(toBound, typeVarAssigns);<a name="line.351"></a>
<FONT color="green">352</FONT>    <a name="line.352"></a>
<FONT color="green">353</FONT>                    // each upper bound of the subject type has to be assignable to<a name="line.353"></a>
<FONT color="green">354</FONT>                    // each<a name="line.354"></a>
<FONT color="green">355</FONT>                    // upper bound of the target type<a name="line.355"></a>
<FONT color="green">356</FONT>                    for (Type bound : upperBounds) {<a name="line.356"></a>
<FONT color="green">357</FONT>                        if (!isAssignable(bound, toBound, typeVarAssigns)) {<a name="line.357"></a>
<FONT color="green">358</FONT>                            return false;<a name="line.358"></a>
<FONT color="green">359</FONT>                        }<a name="line.359"></a>
<FONT color="green">360</FONT>                    }<a name="line.360"></a>
<FONT color="green">361</FONT>                }<a name="line.361"></a>
<FONT color="green">362</FONT>    <a name="line.362"></a>
<FONT color="green">363</FONT>                for (Type toBound : toLowerBounds) {<a name="line.363"></a>
<FONT color="green">364</FONT>                    // if there are assignments for unresolved type variables,<a name="line.364"></a>
<FONT color="green">365</FONT>                    // now's the time to substitute them.<a name="line.365"></a>
<FONT color="green">366</FONT>                    toBound = substituteTypeVariables(toBound, typeVarAssigns);<a name="line.366"></a>
<FONT color="green">367</FONT>    <a name="line.367"></a>
<FONT color="green">368</FONT>                    // each lower bound of the target type has to be assignable to<a name="line.368"></a>
<FONT color="green">369</FONT>                    // each<a name="line.369"></a>
<FONT color="green">370</FONT>                    // lower bound of the subject type<a name="line.370"></a>
<FONT color="green">371</FONT>                    for (Type bound : lowerBounds) {<a name="line.371"></a>
<FONT color="green">372</FONT>                        if (!isAssignable(toBound, bound, typeVarAssigns)) {<a name="line.372"></a>
<FONT color="green">373</FONT>                            return false;<a name="line.373"></a>
<FONT color="green">374</FONT>                        }<a name="line.374"></a>
<FONT color="green">375</FONT>                    }<a name="line.375"></a>
<FONT color="green">376</FONT>                }<a name="line.376"></a>
<FONT color="green">377</FONT>    <a name="line.377"></a>
<FONT color="green">378</FONT>                return true;<a name="line.378"></a>
<FONT color="green">379</FONT>            }<a name="line.379"></a>
<FONT color="green">380</FONT>    <a name="line.380"></a>
<FONT color="green">381</FONT>            for (Type toBound : toUpperBounds) {<a name="line.381"></a>
<FONT color="green">382</FONT>                // if there are assignments for unresolved type variables,<a name="line.382"></a>
<FONT color="green">383</FONT>                // now's the time to substitute them.<a name="line.383"></a>
<FONT color="green">384</FONT>                if (!isAssignable(type, substituteTypeVariables(toBound, typeVarAssigns),<a name="line.384"></a>
<FONT color="green">385</FONT>                        typeVarAssigns)) {<a name="line.385"></a>
<FONT color="green">386</FONT>                    return false;<a name="line.386"></a>
<FONT color="green">387</FONT>                }<a name="line.387"></a>
<FONT color="green">388</FONT>            }<a name="line.388"></a>
<FONT color="green">389</FONT>    <a name="line.389"></a>
<FONT color="green">390</FONT>            for (Type toBound : toLowerBounds) {<a name="line.390"></a>
<FONT color="green">391</FONT>                // if there are assignments for unresolved type variables,<a name="line.391"></a>
<FONT color="green">392</FONT>                // now's the time to substitute them.<a name="line.392"></a>
<FONT color="green">393</FONT>                if (!isAssignable(substituteTypeVariables(toBound, typeVarAssigns), type,<a name="line.393"></a>
<FONT color="green">394</FONT>                        typeVarAssigns)) {<a name="line.394"></a>
<FONT color="green">395</FONT>                    return false;<a name="line.395"></a>
<FONT color="green">396</FONT>                }<a name="line.396"></a>
<FONT color="green">397</FONT>            }<a name="line.397"></a>
<FONT color="green">398</FONT>    <a name="line.398"></a>
<FONT color="green">399</FONT>            return true;<a name="line.399"></a>
<FONT color="green">400</FONT>        }<a name="line.400"></a>
<FONT color="green">401</FONT>    <a name="line.401"></a>
<FONT color="green">402</FONT>        /**<a name="line.402"></a>
<FONT color="green">403</FONT>         * &lt;p&gt; Checks if the subject type may be implicitly cast to the target type<a name="line.403"></a>
<FONT color="green">404</FONT>         * variable following the Java generics rules. &lt;/p&gt;<a name="line.404"></a>
<FONT color="green">405</FONT>         *<a name="line.405"></a>
<FONT color="green">406</FONT>         * @param type the subject type to be assigned to the target type<a name="line.406"></a>
<FONT color="green">407</FONT>         * @param toTypeVariable the target type variable<a name="line.407"></a>
<FONT color="green">408</FONT>         * @param typeVarAssigns a map with type variables<a name="line.408"></a>
<FONT color="green">409</FONT>         * @return true if &lt;code&gt;type&lt;/code&gt; is assignable to<a name="line.409"></a>
<FONT color="green">410</FONT>         * &lt;code&gt;toTypeVariable&lt;/code&gt;.<a name="line.410"></a>
<FONT color="green">411</FONT>         */<a name="line.411"></a>
<FONT color="green">412</FONT>        private static boolean isAssignable(Type type, TypeVariable&lt;?&gt; toTypeVariable,<a name="line.412"></a>
<FONT color="green">413</FONT>                Map&lt;TypeVariable&lt;?&gt;, Type&gt; typeVarAssigns) {<a name="line.413"></a>
<FONT color="green">414</FONT>            if (type == null) {<a name="line.414"></a>
<FONT color="green">415</FONT>                return true;<a name="line.415"></a>
<FONT color="green">416</FONT>            }<a name="line.416"></a>
<FONT color="green">417</FONT>    <a name="line.417"></a>
<FONT color="green">418</FONT>            // only a null type can be assigned to null type which<a name="line.418"></a>
<FONT color="green">419</FONT>            // would have cause the previous to return true<a name="line.419"></a>
<FONT color="green">420</FONT>            if (toTypeVariable == null) {<a name="line.420"></a>
<FONT color="green">421</FONT>                return false;<a name="line.421"></a>
<FONT color="green">422</FONT>            }<a name="line.422"></a>
<FONT color="green">423</FONT>    <a name="line.423"></a>
<FONT color="green">424</FONT>            // all types are assignable to themselves<a name="line.424"></a>
<FONT color="green">425</FONT>            if (toTypeVariable.equals(type)) {<a name="line.425"></a>
<FONT color="green">426</FONT>                return true;<a name="line.426"></a>
<FONT color="green">427</FONT>            }<a name="line.427"></a>
<FONT color="green">428</FONT>    <a name="line.428"></a>
<FONT color="green">429</FONT>            if (type instanceof TypeVariable&lt;?&gt;) {<a name="line.429"></a>
<FONT color="green">430</FONT>                // a type variable is assignable to another type variable, if<a name="line.430"></a>
<FONT color="green">431</FONT>                // and only if the former is the latter, extends the latter, or<a name="line.431"></a>
<FONT color="green">432</FONT>                // is otherwise a descendant of the latter.<a name="line.432"></a>
<FONT color="green">433</FONT>                Type[] bounds = getImplicitBounds((TypeVariable&lt;?&gt;) type);<a name="line.433"></a>
<FONT color="green">434</FONT>    <a name="line.434"></a>
<FONT color="green">435</FONT>                for (Type bound : bounds) {<a name="line.435"></a>
<FONT color="green">436</FONT>                    if (isAssignable(bound, toTypeVariable, typeVarAssigns)) {<a name="line.436"></a>
<FONT color="green">437</FONT>                        return true;<a name="line.437"></a>
<FONT color="green">438</FONT>                    }<a name="line.438"></a>
<FONT color="green">439</FONT>                }<a name="line.439"></a>
<FONT color="green">440</FONT>            }<a name="line.440"></a>
<FONT color="green">441</FONT>    <a name="line.441"></a>
<FONT color="green">442</FONT>            if (type instanceof Class&lt;?&gt; || type instanceof ParameterizedType<a name="line.442"></a>
<FONT color="green">443</FONT>                    || type instanceof GenericArrayType || type instanceof WildcardType) {<a name="line.443"></a>
<FONT color="green">444</FONT>                return false;<a name="line.444"></a>
<FONT color="green">445</FONT>            }<a name="line.445"></a>
<FONT color="green">446</FONT>    <a name="line.446"></a>
<FONT color="green">447</FONT>            throw new IllegalStateException("found an unhandled type: " + type);<a name="line.447"></a>
<FONT color="green">448</FONT>        }<a name="line.448"></a>
<FONT color="green">449</FONT>    <a name="line.449"></a>
<FONT color="green">450</FONT>        /**<a name="line.450"></a>
<FONT color="green">451</FONT>         * &lt;p&gt; &lt;/p&gt;<a name="line.451"></a>
<FONT color="green">452</FONT>         *<a name="line.452"></a>
<FONT color="green">453</FONT>         * @param type the type to be replaced<a name="line.453"></a>
<FONT color="green">454</FONT>         * @param typeVarAssigns the map with type variables<a name="line.454"></a>
<FONT color="green">455</FONT>         * @return the replaced type<a name="line.455"></a>
<FONT color="green">456</FONT>         * @throws IllegalArgumentException if the type cannot be substituted<a name="line.456"></a>
<FONT color="green">457</FONT>         */<a name="line.457"></a>
<FONT color="green">458</FONT>        private static Type substituteTypeVariables(Type type, Map&lt;TypeVariable&lt;?&gt;, Type&gt; typeVarAssigns) {<a name="line.458"></a>
<FONT color="green">459</FONT>            if (type instanceof TypeVariable&lt;?&gt; &amp;&amp; typeVarAssigns != null) {<a name="line.459"></a>
<FONT color="green">460</FONT>                Type replacementType = typeVarAssigns.get(type);<a name="line.460"></a>
<FONT color="green">461</FONT>    <a name="line.461"></a>
<FONT color="green">462</FONT>                if (replacementType == null) {<a name="line.462"></a>
<FONT color="green">463</FONT>                    throw new IllegalArgumentException("missing assignment type for type variable "<a name="line.463"></a>
<FONT color="green">464</FONT>                            + type);<a name="line.464"></a>
<FONT color="green">465</FONT>                }<a name="line.465"></a>
<FONT color="green">466</FONT>    <a name="line.466"></a>
<FONT color="green">467</FONT>                return replacementType;<a name="line.467"></a>
<FONT color="green">468</FONT>            }<a name="line.468"></a>
<FONT color="green">469</FONT>    <a name="line.469"></a>
<FONT color="green">470</FONT>            return type;<a name="line.470"></a>
<FONT color="green">471</FONT>        }<a name="line.471"></a>
<FONT color="green">472</FONT>    <a name="line.472"></a>
<FONT color="green">473</FONT>        /**<a name="line.473"></a>
<FONT color="green">474</FONT>         * &lt;p&gt; Retrieves all the type arguments for this parameterized type<a name="line.474"></a>
<FONT color="green">475</FONT>         * including owner hierarchy arguments such as &lt;code&gt;<a name="line.475"></a>
<FONT color="green">476</FONT>         * Outer&lt;K,V&gt;.Inner&lt;T&gt;.DeepInner&lt;E&gt;&lt;/code&gt; . The arguments are returned in a<a name="line.476"></a>
<FONT color="green">477</FONT>         * {@link Map} specifying the argument type for each {@link TypeVariable}.<a name="line.477"></a>
<FONT color="green">478</FONT>         * &lt;/p&gt;<a name="line.478"></a>
<FONT color="green">479</FONT>         *<a name="line.479"></a>
<FONT color="green">480</FONT>         * @param type specifies the subject parameterized type from which to<a name="line.480"></a>
<FONT color="green">481</FONT>         * harvest the parameters.<a name="line.481"></a>
<FONT color="green">482</FONT>         * @return a map of the type arguments to their respective type variables.<a name="line.482"></a>
<FONT color="green">483</FONT>         */<a name="line.483"></a>
<FONT color="green">484</FONT>        public static Map&lt;TypeVariable&lt;?&gt;, Type&gt; getTypeArguments(ParameterizedType type) {<a name="line.484"></a>
<FONT color="green">485</FONT>            return getTypeArguments(type, getRawType(type), null);<a name="line.485"></a>
<FONT color="green">486</FONT>        }<a name="line.486"></a>
<FONT color="green">487</FONT>    <a name="line.487"></a>
<FONT color="green">488</FONT>        /**<a name="line.488"></a>
<FONT color="green">489</FONT>         * &lt;p&gt; Gets the type arguments of a class/interface based on a subtype. For<a name="line.489"></a>
<FONT color="green">490</FONT>         * instance, this method will determine that both of the parameters for the<a name="line.490"></a>
<FONT color="green">491</FONT>         * interface {@link Map} are {@link Object} for the subtype<a name="line.491"></a>
<FONT color="green">492</FONT>         * {@link java.util.Properties Properties} even though the subtype does not<a name="line.492"></a>
<FONT color="green">493</FONT>         * directly implement the &lt;code&gt;Map&lt;/code&gt; interface. &lt;p&gt; &lt;/p&gt; This method<a name="line.493"></a>
<FONT color="green">494</FONT>         * returns &lt;code&gt;null&lt;/code&gt; if &lt;code&gt;type&lt;/code&gt; is not assignable to<a name="line.494"></a>
<FONT color="green">495</FONT>         * &lt;code&gt;toClass&lt;/code&gt;. It returns an empty map if none of the classes or<a name="line.495"></a>
<FONT color="green">496</FONT>         * interfaces in its inheritance hierarchy specify any type arguments. &lt;/p&gt;<a name="line.496"></a>
<FONT color="green">497</FONT>         * &lt;p&gt; A side-effect of this method is that it also retrieves the type<a name="line.497"></a>
<FONT color="green">498</FONT>         * arguments for the classes and interfaces that are part of the hierarchy<a name="line.498"></a>
<FONT color="green">499</FONT>         * between &lt;code&gt;type&lt;/code&gt; and &lt;code&gt;toClass&lt;/code&gt;. So with the above<a name="line.499"></a>
<FONT color="green">500</FONT>         * example, this method will also determine that the type arguments for<a name="line.500"></a>
<FONT color="green">501</FONT>         * {@link java.util.Hashtable Hashtable} are also both &lt;code&gt;Object&lt;/code&gt;.<a name="line.501"></a>
<FONT color="green">502</FONT>         * In cases where the interface specified by &lt;code&gt;toClass&lt;/code&gt; is<a name="line.502"></a>
<FONT color="green">503</FONT>         * (indirectly) implemented more than once (e.g. where &lt;code&gt;toClass&lt;/code&gt;<a name="line.503"></a>
<FONT color="green">504</FONT>         * specifies the interface {@link java.lang.Iterable Iterable} and<a name="line.504"></a>
<FONT color="green">505</FONT>         * &lt;code&gt;type&lt;/code&gt; specifies a parameterized type that implements both<a name="line.505"></a>
<FONT color="green">506</FONT>         * {@link java.util.Set Set} and {@link java.util.Collection Collection}),<a name="line.506"></a>
<FONT color="green">507</FONT>         * this method will look at the inheritance hierarchy of only one of the<a name="line.507"></a>
<FONT color="green">508</FONT>         * implementations/subclasses; the first interface encountered that isn't a<a name="line.508"></a>
<FONT color="green">509</FONT>         * subinterface to one of the others in the &lt;code&gt;type&lt;/code&gt; to<a name="line.509"></a>
<FONT color="green">510</FONT>         * &lt;code&gt;toClass&lt;/code&gt; hierarchy. &lt;/p&gt;<a name="line.510"></a>
<FONT color="green">511</FONT>         *<a name="line.511"></a>
<FONT color="green">512</FONT>         * @param type the type from which to determine the type parameters of<a name="line.512"></a>
<FONT color="green">513</FONT>         * &lt;code&gt;toClass&lt;/code&gt;<a name="line.513"></a>
<FONT color="green">514</FONT>         * @param toClass the class whose type parameters are to be determined based<a name="line.514"></a>
<FONT color="green">515</FONT>         * on the subtype &lt;code&gt;type&lt;/code&gt;<a name="line.515"></a>
<FONT color="green">516</FONT>         * @return a map of the type assignments for the type variables in each type<a name="line.516"></a>
<FONT color="green">517</FONT>         * in the inheritance hierarchy from &lt;code&gt;type&lt;/code&gt; to<a name="line.517"></a>
<FONT color="green">518</FONT>         * &lt;code&gt;toClass&lt;/code&gt; inclusive.<a name="line.518"></a>
<FONT color="green">519</FONT>         */<a name="line.519"></a>
<FONT color="green">520</FONT>        public static Map&lt;TypeVariable&lt;?&gt;, Type&gt; getTypeArguments(Type type, Class&lt;?&gt; toClass) {<a name="line.520"></a>
<FONT color="green">521</FONT>            return getTypeArguments(type, toClass, null);<a name="line.521"></a>
<FONT color="green">522</FONT>        }<a name="line.522"></a>
<FONT color="green">523</FONT>    <a name="line.523"></a>
<FONT color="green">524</FONT>        /**<a name="line.524"></a>
<FONT color="green">525</FONT>         * &lt;p&gt; Return a map of the type arguments of &lt;code&gt;type&lt;/code&gt; in the context of &lt;code&gt;toClass&lt;/code&gt;. &lt;/p&gt;<a name="line.525"></a>
<FONT color="green">526</FONT>         *<a name="line.526"></a>
<FONT color="green">527</FONT>         * @param type the type in question<a name="line.527"></a>
<FONT color="green">528</FONT>         * @param toClass the class<a name="line.528"></a>
<FONT color="green">529</FONT>         * @param subtypeVarAssigns a map with type variables<a name="line.529"></a>
<FONT color="green">530</FONT>         * @return the map with type arguments<a name="line.530"></a>
<FONT color="green">531</FONT>         */<a name="line.531"></a>
<FONT color="green">532</FONT>        private static Map&lt;TypeVariable&lt;?&gt;, Type&gt; getTypeArguments(Type type, Class&lt;?&gt; toClass,<a name="line.532"></a>
<FONT color="green">533</FONT>                Map&lt;TypeVariable&lt;?&gt;, Type&gt; subtypeVarAssigns) {<a name="line.533"></a>
<FONT color="green">534</FONT>            if (type instanceof Class&lt;?&gt;) {<a name="line.534"></a>
<FONT color="green">535</FONT>                return getTypeArguments((Class&lt;?&gt;) type, toClass, subtypeVarAssigns);<a name="line.535"></a>
<FONT color="green">536</FONT>            }<a name="line.536"></a>
<FONT color="green">537</FONT>    <a name="line.537"></a>
<FONT color="green">538</FONT>            if (type instanceof ParameterizedType) {<a name="line.538"></a>
<FONT color="green">539</FONT>                return getTypeArguments((ParameterizedType) type, toClass, subtypeVarAssigns);<a name="line.539"></a>
<FONT color="green">540</FONT>            }<a name="line.540"></a>
<FONT color="green">541</FONT>    <a name="line.541"></a>
<FONT color="green">542</FONT>            if (type instanceof GenericArrayType) {<a name="line.542"></a>
<FONT color="green">543</FONT>                return getTypeArguments(((GenericArrayType) type).getGenericComponentType(), toClass<a name="line.543"></a>
<FONT color="green">544</FONT>                        .isArray() ? toClass.getComponentType() : toClass, subtypeVarAssigns);<a name="line.544"></a>
<FONT color="green">545</FONT>            }<a name="line.545"></a>
<FONT color="green">546</FONT>    <a name="line.546"></a>
<FONT color="green">547</FONT>            // since wildcard types are not assignable to classes, should this just<a name="line.547"></a>
<FONT color="green">548</FONT>            // return null?<a name="line.548"></a>
<FONT color="green">549</FONT>            if (type instanceof WildcardType) {<a name="line.549"></a>
<FONT color="green">550</FONT>                for (Type bound : getImplicitUpperBounds((WildcardType) type)) {<a name="line.550"></a>
<FONT color="green">551</FONT>                    // find the first bound that is assignable to the target class<a name="line.551"></a>
<FONT color="green">552</FONT>                    if (isAssignable(bound, toClass)) {<a name="line.552"></a>
<FONT color="green">553</FONT>                        return getTypeArguments(bound, toClass, subtypeVarAssigns);<a name="line.553"></a>
<FONT color="green">554</FONT>                    }<a name="line.554"></a>
<FONT color="green">555</FONT>                }<a name="line.555"></a>
<FONT color="green">556</FONT>    <a name="line.556"></a>
<FONT color="green">557</FONT>                return null;<a name="line.557"></a>
<FONT color="green">558</FONT>            }<a name="line.558"></a>
<FONT color="green">559</FONT>    <a name="line.559"></a>
<FONT color="green">560</FONT>            // *<a name="line.560"></a>
<FONT color="green">561</FONT>            if (type instanceof TypeVariable&lt;?&gt;) {<a name="line.561"></a>
<FONT color="green">562</FONT>                for (Type bound : getImplicitBounds((TypeVariable&lt;?&gt;) type)) {<a name="line.562"></a>
<FONT color="green">563</FONT>                    // find the first bound that is assignable to the target class<a name="line.563"></a>
<FONT color="green">564</FONT>                    if (isAssignable(bound, toClass)) {<a name="line.564"></a>
<FONT color="green">565</FONT>                        return getTypeArguments(bound, toClass, subtypeVarAssigns);<a name="line.565"></a>
<FONT color="green">566</FONT>                    }<a name="line.566"></a>
<FONT color="green">567</FONT>                }<a name="line.567"></a>
<FONT color="green">568</FONT>    <a name="line.568"></a>
<FONT color="green">569</FONT>                return null;<a name="line.569"></a>
<FONT color="green">570</FONT>            }<a name="line.570"></a>
<FONT color="green">571</FONT>            // */<a name="line.571"></a>
<FONT color="green">572</FONT>    <a name="line.572"></a>
<FONT color="green">573</FONT>            throw new IllegalStateException("found an unhandled type: " + type);<a name="line.573"></a>
<FONT color="green">574</FONT>        }<a name="line.574"></a>
<FONT color="green">575</FONT>    <a name="line.575"></a>
<FONT color="green">576</FONT>        /**<a name="line.576"></a>
<FONT color="green">577</FONT>         * &lt;p&gt; Return a map of the type arguments of a parameterized type in the context of &lt;code&gt;toClass&lt;/code&gt;. &lt;/p&gt;<a name="line.577"></a>
<FONT color="green">578</FONT>         *<a name="line.578"></a>
<FONT color="green">579</FONT>         * @param parameterizedType the parameterized type<a name="line.579"></a>
<FONT color="green">580</FONT>         * @param toClass the class<a name="line.580"></a>
<FONT color="green">581</FONT>         * @param subtypeVarAssigns a map with type variables<a name="line.581"></a>
<FONT color="green">582</FONT>         * @return the map with type arguments<a name="line.582"></a>
<FONT color="green">583</FONT>         */<a name="line.583"></a>
<FONT color="green">584</FONT>        private static Map&lt;TypeVariable&lt;?&gt;, Type&gt; getTypeArguments(<a name="line.584"></a>
<FONT color="green">585</FONT>                ParameterizedType parameterizedType, Class&lt;?&gt; toClass,<a name="line.585"></a>
<FONT color="green">586</FONT>                Map&lt;TypeVariable&lt;?&gt;, Type&gt; subtypeVarAssigns) {<a name="line.586"></a>
<FONT color="green">587</FONT>            Class&lt;?&gt; cls = getRawType(parameterizedType);<a name="line.587"></a>
<FONT color="green">588</FONT>    <a name="line.588"></a>
<FONT color="green">589</FONT>            // make sure they're assignable<a name="line.589"></a>
<FONT color="green">590</FONT>            if (!isAssignable(cls, toClass)) {<a name="line.590"></a>
<FONT color="green">591</FONT>                return null;<a name="line.591"></a>
<FONT color="green">592</FONT>            }<a name="line.592"></a>
<FONT color="green">593</FONT>    <a name="line.593"></a>
<FONT color="green">594</FONT>            Type ownerType = parameterizedType.getOwnerType();<a name="line.594"></a>
<FONT color="green">595</FONT>            Map&lt;TypeVariable&lt;?&gt;, Type&gt; typeVarAssigns;<a name="line.595"></a>
<FONT color="green">596</FONT>    <a name="line.596"></a>
<FONT color="green">597</FONT>            if (ownerType instanceof ParameterizedType) {<a name="line.597"></a>
<FONT color="green">598</FONT>                // get the owner type arguments first<a name="line.598"></a>
<FONT color="green">599</FONT>                ParameterizedType parameterizedOwnerType = (ParameterizedType) ownerType;<a name="line.599"></a>
<FONT color="green">600</FONT>                typeVarAssigns = getTypeArguments(parameterizedOwnerType,<a name="line.600"></a>
<FONT color="green">601</FONT>                        getRawType(parameterizedOwnerType), subtypeVarAssigns);<a name="line.601"></a>
<FONT color="green">602</FONT>            } else {<a name="line.602"></a>
<FONT color="green">603</FONT>                // no owner, prep the type variable assignments map<a name="line.603"></a>
<FONT color="green">604</FONT>                typeVarAssigns = subtypeVarAssigns == null ? new HashMap&lt;TypeVariable&lt;?&gt;, Type&gt;()<a name="line.604"></a>
<FONT color="green">605</FONT>                        : new HashMap&lt;TypeVariable&lt;?&gt;, Type&gt;(subtypeVarAssigns);<a name="line.605"></a>
<FONT color="green">606</FONT>            }<a name="line.606"></a>
<FONT color="green">607</FONT>    <a name="line.607"></a>
<FONT color="green">608</FONT>            // get the subject parameterized type's arguments<a name="line.608"></a>
<FONT color="green">609</FONT>            Type[] typeArgs = parameterizedType.getActualTypeArguments();<a name="line.609"></a>
<FONT color="green">610</FONT>            // and get the corresponding type variables from the raw class<a name="line.610"></a>
<FONT color="green">611</FONT>            TypeVariable&lt;?&gt;[] typeParams = cls.getTypeParameters();<a name="line.611"></a>
<FONT color="green">612</FONT>    <a name="line.612"></a>
<FONT color="green">613</FONT>            // map the arguments to their respective type variables<a name="line.613"></a>
<FONT color="green">614</FONT>            for (int i = 0; i &lt; typeParams.length; i++) {<a name="line.614"></a>
<FONT color="green">615</FONT>                Type typeArg = typeArgs[i];<a name="line.615"></a>
<FONT color="green">616</FONT>                typeVarAssigns.put(typeParams[i], typeVarAssigns.containsKey(typeArg) ? typeVarAssigns<a name="line.616"></a>
<FONT color="green">617</FONT>                        .get(typeArg) : typeArg);<a name="line.617"></a>
<FONT color="green">618</FONT>            }<a name="line.618"></a>
<FONT color="green">619</FONT>    <a name="line.619"></a>
<FONT color="green">620</FONT>            if (toClass.equals(cls)) {<a name="line.620"></a>
<FONT color="green">621</FONT>                // target class has been reached. Done.<a name="line.621"></a>
<FONT color="green">622</FONT>                return typeVarAssigns;<a name="line.622"></a>
<FONT color="green">623</FONT>            }<a name="line.623"></a>
<FONT color="green">624</FONT>    <a name="line.624"></a>
<FONT color="green">625</FONT>            // walk the inheritance hierarchy until the target class is reached<a name="line.625"></a>
<FONT color="green">626</FONT>            return getTypeArguments(getClosestParentType(cls, toClass), toClass, typeVarAssigns);<a name="line.626"></a>
<FONT color="green">627</FONT>        }<a name="line.627"></a>
<FONT color="green">628</FONT>    <a name="line.628"></a>
<FONT color="green">629</FONT>        /**<a name="line.629"></a>
<FONT color="green">630</FONT>         * &lt;p&gt; Return a map of the type arguments of a class in the context of &lt;code&gt;toClass&lt;/code&gt;. &lt;/p&gt;<a name="line.630"></a>
<FONT color="green">631</FONT>         *<a name="line.631"></a>
<FONT color="green">632</FONT>         * @param cls the class in question<a name="line.632"></a>
<FONT color="green">633</FONT>         * @param toClass the context class<a name="line.633"></a>
<FONT color="green">634</FONT>         * @param subtypeVarAssigns a map with type variables<a name="line.634"></a>
<FONT color="green">635</FONT>         * @return the map with type arguments<a name="line.635"></a>
<FONT color="green">636</FONT>         */<a name="line.636"></a>
<FONT color="green">637</FONT>        private static Map&lt;TypeVariable&lt;?&gt;, Type&gt; getTypeArguments(Class&lt;?&gt; cls, Class&lt;?&gt; toClass,<a name="line.637"></a>
<FONT color="green">638</FONT>                Map&lt;TypeVariable&lt;?&gt;, Type&gt; subtypeVarAssigns) {<a name="line.638"></a>
<FONT color="green">639</FONT>            // make sure they're assignable<a name="line.639"></a>
<FONT color="green">640</FONT>            if (!isAssignable(cls, toClass)) {<a name="line.640"></a>
<FONT color="green">641</FONT>                return null;<a name="line.641"></a>
<FONT color="green">642</FONT>            }<a name="line.642"></a>
<FONT color="green">643</FONT>    <a name="line.643"></a>
<FONT color="green">644</FONT>            // can't work with primitives<a name="line.644"></a>
<FONT color="green">645</FONT>            if (cls.isPrimitive()) {<a name="line.645"></a>
<FONT color="green">646</FONT>                // both classes are primitives?<a name="line.646"></a>
<FONT color="green">647</FONT>                if (toClass.isPrimitive()) {<a name="line.647"></a>
<FONT color="green">648</FONT>                    // dealing with widening here. No type arguments to be<a name="line.648"></a>
<FONT color="green">649</FONT>                    // harvested with these two types.<a name="line.649"></a>
<FONT color="green">650</FONT>                    return new HashMap&lt;TypeVariable&lt;?&gt;, Type&gt;();<a name="line.650"></a>
<FONT color="green">651</FONT>                }<a name="line.651"></a>
<FONT color="green">652</FONT>    <a name="line.652"></a>
<FONT color="green">653</FONT>                // work with wrapper the wrapper class instead of the primitive<a name="line.653"></a>
<FONT color="green">654</FONT>                cls = ClassUtils.primitiveToWrapper(cls);<a name="line.654"></a>
<FONT color="green">655</FONT>            }<a name="line.655"></a>
<FONT color="green">656</FONT>    <a name="line.656"></a>
<FONT color="green">657</FONT>            // create a copy of the incoming map, or an empty one if it's null<a name="line.657"></a>
<FONT color="green">658</FONT>            HashMap&lt;TypeVariable&lt;?&gt;, Type&gt; typeVarAssigns = subtypeVarAssigns == null ? new HashMap&lt;TypeVariable&lt;?&gt;, Type&gt;()<a name="line.658"></a>
<FONT color="green">659</FONT>                    : new HashMap&lt;TypeVariable&lt;?&gt;, Type&gt;(subtypeVarAssigns);<a name="line.659"></a>
<FONT color="green">660</FONT>    <a name="line.660"></a>
<FONT color="green">661</FONT>            // no arguments for the parameters, or target class has been reached<a name="line.661"></a>
<FONT color="green">662</FONT>            if (cls.getTypeParameters().length &gt; 0 || toClass.equals(cls)) {<a name="line.662"></a>
<FONT color="green">663</FONT>                return typeVarAssigns;<a name="line.663"></a>
<FONT color="green">664</FONT>            }<a name="line.664"></a>
<FONT color="green">665</FONT>    <a name="line.665"></a>
<FONT color="green">666</FONT>            // walk the inheritance hierarchy until the target class is reached<a name="line.666"></a>
<FONT color="green">667</FONT>            return getTypeArguments(getClosestParentType(cls, toClass), toClass, typeVarAssigns);<a name="line.667"></a>
<FONT color="green">668</FONT>        }<a name="line.668"></a>
<FONT color="green">669</FONT>    <a name="line.669"></a>
<FONT color="green">670</FONT>        /**<a name="line.670"></a>
<FONT color="green">671</FONT>         * &lt;p&gt; Tries to determine the type arguments of a class/interface based on a<a name="line.671"></a>
<FONT color="green">672</FONT>         * super parameterized type's type arguments. This method is the inverse of<a name="line.672"></a>
<FONT color="green">673</FONT>         * {@link #getTypeArguments(Type, Class)} which gets a class/interface's<a name="line.673"></a>
<FONT color="green">674</FONT>         * type arguments based on a subtype. It is far more limited in determining<a name="line.674"></a>
<FONT color="green">675</FONT>         * the type arguments for the subject class's type variables in that it can<a name="line.675"></a>
<FONT color="green">676</FONT>         * only determine those parameters that map from the subject {@link Class}<a name="line.676"></a>
<FONT color="green">677</FONT>         * object to the supertype. &lt;/p&gt; &lt;p&gt; Example: {@link java.util.TreeSet<a name="line.677"></a>
<FONT color="green">678</FONT>         * TreeSet} sets its parameter as the parameter for<a name="line.678"></a>
<FONT color="green">679</FONT>         * {@link java.util.NavigableSet NavigableSet}, which in turn sets the<a name="line.679"></a>
<FONT color="green">680</FONT>         * parameter of {@link java.util.SortedSet}, which in turn sets the<a name="line.680"></a>
<FONT color="green">681</FONT>         * parameter of {@link Set}, which in turn sets the parameter of<a name="line.681"></a>
<FONT color="green">682</FONT>         * {@link java.util.Collection}, which in turn sets the parameter of<a name="line.682"></a>
<FONT color="green">683</FONT>         * {@link java.lang.Iterable}. Since &lt;code&gt;TreeSet&lt;/code&gt;'s parameter maps<a name="line.683"></a>
<FONT color="green">684</FONT>         * (indirectly) to &lt;code&gt;Iterable&lt;/code&gt;'s parameter, it will be able to<a name="line.684"></a>
<FONT color="green">685</FONT>         * determine that based on the super type &lt;code&gt;Iterable&lt;? extends<a name="line.685"></a>
<FONT color="green">686</FONT>         * Map&lt;Integer,? extends Collection&lt;?&gt;&gt;&gt;&lt;/code&gt;, the parameter of<a name="line.686"></a>
<FONT color="green">687</FONT>         * &lt;code&gt;TreeSet&lt;/code&gt; is &lt;code&gt;? extends Map&lt;Integer,? extends<a name="line.687"></a>
<FONT color="green">688</FONT>         * Collection&lt;?&gt;&gt;&lt;/code&gt;. &lt;/p&gt;<a name="line.688"></a>
<FONT color="green">689</FONT>         *<a name="line.689"></a>
<FONT color="green">690</FONT>         * @param cls the class whose type parameters are to be determined<a name="line.690"></a>
<FONT color="green">691</FONT>         * @param superType the super type from which &lt;code&gt;cls&lt;/code&gt;'s type<a name="line.691"></a>
<FONT color="green">692</FONT>         * arguments are to be determined<a name="line.692"></a>
<FONT color="green">693</FONT>         * @return a map of the type assignments that could be determined for the<a name="line.693"></a>
<FONT color="green">694</FONT>         * type variables in each type in the inheritance hierarchy from<a name="line.694"></a>
<FONT color="green">695</FONT>         * &lt;code&gt;type&lt;/code&gt; to &lt;code&gt;toClass&lt;/code&gt; inclusive.<a name="line.695"></a>
<FONT color="green">696</FONT>         */<a name="line.696"></a>
<FONT color="green">697</FONT>        public static Map&lt;TypeVariable&lt;?&gt;, Type&gt; determineTypeArguments(Class&lt;?&gt; cls,<a name="line.697"></a>
<FONT color="green">698</FONT>                ParameterizedType superType) {<a name="line.698"></a>
<FONT color="green">699</FONT>            Class&lt;?&gt; superClass = getRawType(superType);<a name="line.699"></a>
<FONT color="green">700</FONT>    <a name="line.700"></a>
<FONT color="green">701</FONT>            // compatibility check<a name="line.701"></a>
<FONT color="green">702</FONT>            if (!isAssignable(cls, superClass)) {<a name="line.702"></a>
<FONT color="green">703</FONT>                return null;<a name="line.703"></a>
<FONT color="green">704</FONT>            }<a name="line.704"></a>
<FONT color="green">705</FONT>    <a name="line.705"></a>
<FONT color="green">706</FONT>            if (cls.equals(superClass)) {<a name="line.706"></a>
<FONT color="green">707</FONT>                return getTypeArguments(superType, superClass, null);<a name="line.707"></a>
<FONT color="green">708</FONT>            }<a name="line.708"></a>
<FONT color="green">709</FONT>    <a name="line.709"></a>
<FONT color="green">710</FONT>            // get the next class in the inheritance hierarchy<a name="line.710"></a>
<FONT color="green">711</FONT>            Type midType = getClosestParentType(cls, superClass);<a name="line.711"></a>
<FONT color="green">712</FONT>    <a name="line.712"></a>
<FONT color="green">713</FONT>            // can only be a class or a parameterized type<a name="line.713"></a>
<FONT color="green">714</FONT>            if (midType instanceof Class&lt;?&gt;) {<a name="line.714"></a>
<FONT color="green">715</FONT>                return determineTypeArguments((Class&lt;?&gt;) midType, superType);<a name="line.715"></a>
<FONT color="green">716</FONT>            }<a name="line.716"></a>
<FONT color="green">717</FONT>    <a name="line.717"></a>
<FONT color="green">718</FONT>            ParameterizedType midParameterizedType = (ParameterizedType) midType;<a name="line.718"></a>
<FONT color="green">719</FONT>            Class&lt;?&gt; midClass = getRawType(midParameterizedType);<a name="line.719"></a>
<FONT color="green">720</FONT>            // get the type variables of the mid class that map to the type<a name="line.720"></a>
<FONT color="green">721</FONT>            // arguments of the super class<a name="line.721"></a>
<FONT color="green">722</FONT>            Map&lt;TypeVariable&lt;?&gt;, Type&gt; typeVarAssigns = determineTypeArguments(midClass, superType);<a name="line.722"></a>
<FONT color="green">723</FONT>            // map the arguments of the mid type to the class type variables<a name="line.723"></a>
<FONT color="green">724</FONT>            mapTypeVariablesToArguments(cls, midParameterizedType, typeVarAssigns);<a name="line.724"></a>
<FONT color="green">725</FONT>    <a name="line.725"></a>
<FONT color="green">726</FONT>            return typeVarAssigns;<a name="line.726"></a>
<FONT color="green">727</FONT>        }<a name="line.727"></a>
<FONT color="green">728</FONT>    <a name="line.728"></a>
<FONT color="green">729</FONT>        /**<a name="line.729"></a>
<FONT color="green">730</FONT>         * &lt;p&gt;Performs a mapping of type variables.&lt;/p&gt;<a name="line.730"></a>
<FONT color="green">731</FONT>         *<a name="line.731"></a>
<FONT color="green">732</FONT>         * @param &lt;T&gt; the generic type of the class in question<a name="line.732"></a>
<FONT color="green">733</FONT>         * @param cls the class in question<a name="line.733"></a>
<FONT color="green">734</FONT>         * @param parameterizedType the parameterized type<a name="line.734"></a>
<FONT color="green">735</FONT>         * @param typeVarAssigns the map to be filled<a name="line.735"></a>
<FONT color="green">736</FONT>         */<a name="line.736"></a>
<FONT color="green">737</FONT>        private static &lt;T&gt; void mapTypeVariablesToArguments(Class&lt;T&gt; cls,<a name="line.737"></a>
<FONT color="green">738</FONT>                ParameterizedType parameterizedType, Map&lt;TypeVariable&lt;?&gt;, Type&gt; typeVarAssigns) {<a name="line.738"></a>
<FONT color="green">739</FONT>            // capture the type variables from the owner type that have assignments<a name="line.739"></a>
<FONT color="green">740</FONT>            Type ownerType = parameterizedType.getOwnerType();<a name="line.740"></a>
<FONT color="green">741</FONT>    <a name="line.741"></a>
<FONT color="green">742</FONT>            if (ownerType instanceof ParameterizedType) {<a name="line.742"></a>
<FONT color="green">743</FONT>                // recursion to make sure the owner's owner type gets processed<a name="line.743"></a>
<FONT color="green">744</FONT>                mapTypeVariablesToArguments(cls, (ParameterizedType) ownerType, typeVarAssigns);<a name="line.744"></a>
<FONT color="green">745</FONT>            }<a name="line.745"></a>
<FONT color="green">746</FONT>    <a name="line.746"></a>
<FONT color="green">747</FONT>            // parameterizedType is a generic interface/class (or it's in the owner<a name="line.747"></a>
<FONT color="green">748</FONT>            // hierarchy of said interface/class) implemented/extended by the class<a name="line.748"></a>
<FONT color="green">749</FONT>            // cls. Find out which type variables of cls are type arguments of<a name="line.749"></a>
<FONT color="green">750</FONT>            // parameterizedType:<a name="line.750"></a>
<FONT color="green">751</FONT>            Type[] typeArgs = parameterizedType.getActualTypeArguments();<a name="line.751"></a>
<FONT color="green">752</FONT>    <a name="line.752"></a>
<FONT color="green">753</FONT>            // of the cls's type variables that are arguments of parameterizedType,<a name="line.753"></a>
<FONT color="green">754</FONT>            // find out which ones can be determined from the super type's arguments<a name="line.754"></a>
<FONT color="green">755</FONT>            TypeVariable&lt;?&gt;[] typeVars = getRawType(parameterizedType).getTypeParameters();<a name="line.755"></a>
<FONT color="green">756</FONT>    <a name="line.756"></a>
<FONT color="green">757</FONT>            // use List view of type parameters of cls so the contains() method can be used:<a name="line.757"></a>
<FONT color="green">758</FONT>            List&lt;TypeVariable&lt;Class&lt;T&gt;&gt;&gt; typeVarList = Arrays.asList(cls<a name="line.758"></a>
<FONT color="green">759</FONT>                    .getTypeParameters());<a name="line.759"></a>
<FONT color="green">760</FONT>    <a name="line.760"></a>
<FONT color="green">761</FONT>            for (int i = 0; i &lt; typeArgs.length; i++) {<a name="line.761"></a>
<FONT color="green">762</FONT>                TypeVariable&lt;?&gt; typeVar = typeVars[i];<a name="line.762"></a>
<FONT color="green">763</FONT>                Type typeArg = typeArgs[i];<a name="line.763"></a>
<FONT color="green">764</FONT>    <a name="line.764"></a>
<FONT color="green">765</FONT>                // argument of parameterizedType is a type variable of cls<a name="line.765"></a>
<FONT color="green">766</FONT>                if (typeVarList.contains(typeArg)<a name="line.766"></a>
<FONT color="green">767</FONT>                // type variable of parameterizedType has an assignment in<a name="line.767"></a>
<FONT color="green">768</FONT>                        // the super type.<a name="line.768"></a>
<FONT color="green">769</FONT>                        &amp;&amp; typeVarAssigns.containsKey(typeVar)) {<a name="line.769"></a>
<FONT color="green">770</FONT>                    // map the assignment to the cls's type variable<a name="line.770"></a>
<FONT color="green">771</FONT>                    typeVarAssigns.put((TypeVariable&lt;?&gt;) typeArg, typeVarAssigns.get(typeVar));<a name="line.771"></a>
<FONT color="green">772</FONT>                }<a name="line.772"></a>
<FONT color="green">773</FONT>            }<a name="line.773"></a>
<FONT color="green">774</FONT>        }<a name="line.774"></a>
<FONT color="green">775</FONT>    <a name="line.775"></a>
<FONT color="green">776</FONT>        /**<a name="line.776"></a>
<FONT color="green">777</FONT>         * &lt;p&gt; Closest parent type? Closest to what? The closest parent type to the<a name="line.777"></a>
<FONT color="green">778</FONT>         * super class specified by &lt;code&gt;superClass&lt;/code&gt;. &lt;/p&gt;<a name="line.778"></a>
<FONT color="green">779</FONT>         *<a name="line.779"></a>
<FONT color="green">780</FONT>         * @param cls the class in question<a name="line.780"></a>
<FONT color="green">781</FONT>         * @param superClass the super class<a name="line.781"></a>
<FONT color="green">782</FONT>         * @return the closes parent type<a name="line.782"></a>
<FONT color="green">783</FONT>         */<a name="line.783"></a>
<FONT color="green">784</FONT>        private static Type getClosestParentType(Class&lt;?&gt; cls, Class&lt;?&gt; superClass) {<a name="line.784"></a>
<FONT color="green">785</FONT>            // only look at the interfaces if the super class is also an interface<a name="line.785"></a>
<FONT color="green">786</FONT>            if (superClass.isInterface()) {<a name="line.786"></a>
<FONT color="green">787</FONT>                // get the generic interfaces of the subject class<a name="line.787"></a>
<FONT color="green">788</FONT>                Type[] interfaceTypes = cls.getGenericInterfaces();<a name="line.788"></a>
<FONT color="green">789</FONT>                // will hold the best generic interface match found<a name="line.789"></a>
<FONT color="green">790</FONT>                Type genericInterface = null;<a name="line.790"></a>
<FONT color="green">791</FONT>    <a name="line.791"></a>
<FONT color="green">792</FONT>                // find the interface closest to the super class<a name="line.792"></a>
<FONT color="green">793</FONT>                for (Type midType : interfaceTypes) {<a name="line.793"></a>
<FONT color="green">794</FONT>                    Class&lt;?&gt; midClass = null;<a name="line.794"></a>
<FONT color="green">795</FONT>    <a name="line.795"></a>
<FONT color="green">796</FONT>                    if (midType instanceof ParameterizedType) {<a name="line.796"></a>
<FONT color="green">797</FONT>                        midClass = getRawType((ParameterizedType) midType);<a name="line.797"></a>
<FONT color="green">798</FONT>                    } else if (midType instanceof Class&lt;?&gt;) {<a name="line.798"></a>
<FONT color="green">799</FONT>                        midClass = (Class&lt;?&gt;) midType;<a name="line.799"></a>
<FONT color="green">800</FONT>                    } else {<a name="line.800"></a>
<FONT color="green">801</FONT>                        throw new IllegalStateException("Unexpected generic"<a name="line.801"></a>
<FONT color="green">802</FONT>                                + " interface type found: " + midType);<a name="line.802"></a>
<FONT color="green">803</FONT>                    }<a name="line.803"></a>
<FONT color="green">804</FONT>    <a name="line.804"></a>
<FONT color="green">805</FONT>                    // check if this interface is further up the inheritance chain<a name="line.805"></a>
<FONT color="green">806</FONT>                    // than the previously found match<a name="line.806"></a>
<FONT color="green">807</FONT>                    if (isAssignable(midClass, superClass)<a name="line.807"></a>
<FONT color="green">808</FONT>                            &amp;&amp; isAssignable(genericInterface, (Type) midClass)) {<a name="line.808"></a>
<FONT color="green">809</FONT>                        genericInterface = midType;<a name="line.809"></a>
<FONT color="green">810</FONT>                    }<a name="line.810"></a>
<FONT color="green">811</FONT>                }<a name="line.811"></a>
<FONT color="green">812</FONT>    <a name="line.812"></a>
<FONT color="green">813</FONT>                // found a match?<a name="line.813"></a>
<FONT color="green">814</FONT>                if (genericInterface != null) {<a name="line.814"></a>
<FONT color="green">815</FONT>                    return genericInterface;<a name="line.815"></a>
<FONT color="green">816</FONT>                }<a name="line.816"></a>
<FONT color="green">817</FONT>            }<a name="line.817"></a>
<FONT color="green">818</FONT>    <a name="line.818"></a>
<FONT color="green">819</FONT>            // none of the interfaces were descendants of the target class, so the<a name="line.819"></a>
<FONT color="green">820</FONT>            // super class has to be one, instead<a name="line.820"></a>
<FONT color="green">821</FONT>            return cls.getGenericSuperclass();<a name="line.821"></a>
<FONT color="green">822</FONT>        }<a name="line.822"></a>
<FONT color="green">823</FONT>    <a name="line.823"></a>
<FONT color="green">824</FONT>        /**<a name="line.824"></a>
<FONT color="green">825</FONT>         * &lt;p&gt; Checks if the given value can be assigned to the target type<a name="line.825"></a>
<FONT color="green">826</FONT>         * following the Java generics rules. &lt;/p&gt;<a name="line.826"></a>
<FONT color="green">827</FONT>         *<a name="line.827"></a>
<FONT color="green">828</FONT>         * @param value the value to be checked<a name="line.828"></a>
<FONT color="green">829</FONT>         * @param type the target type<a name="line.829"></a>
<FONT color="green">830</FONT>         * @return true of &lt;code&gt;value&lt;/code&gt; is an instance of &lt;code&gt;type&lt;/code&gt;.<a name="line.830"></a>
<FONT color="green">831</FONT>         */<a name="line.831"></a>
<FONT color="green">832</FONT>        public static boolean isInstance(Object value, Type type) {<a name="line.832"></a>
<FONT color="green">833</FONT>            if (type == null) {<a name="line.833"></a>
<FONT color="green">834</FONT>                return false;<a name="line.834"></a>
<FONT color="green">835</FONT>            }<a name="line.835"></a>
<FONT color="green">836</FONT>    <a name="line.836"></a>
<FONT color="green">837</FONT>            return value == null ? !(type instanceof Class&lt;?&gt;) || !((Class&lt;?&gt;) type).isPrimitive()<a name="line.837"></a>
<FONT color="green">838</FONT>                    : isAssignable(value.getClass(), type, null);<a name="line.838"></a>
<FONT color="green">839</FONT>        }<a name="line.839"></a>
<FONT color="green">840</FONT>    <a name="line.840"></a>
<FONT color="green">841</FONT>        /**<a name="line.841"></a>
<FONT color="green">842</FONT>         * &lt;p&gt; This method strips out the redundant upper bound types in type<a name="line.842"></a>
<FONT color="green">843</FONT>         * variable types and wildcard types (or it would with wildcard types if<a name="line.843"></a>
<FONT color="green">844</FONT>         * multiple upper bounds were allowed). &lt;/p&gt; &lt;p&gt; Example: with the variable<a name="line.844"></a>
<FONT color="green">845</FONT>         * type declaration:<a name="line.845"></a>
<FONT color="green">846</FONT>         *<a name="line.846"></a>
<FONT color="green">847</FONT>         * &lt;pre&gt; &amp;lt;K extends java.util.Collection&amp;lt;String&amp;gt; &amp;amp;<a name="line.847"></a>
<FONT color="green">848</FONT>         * java.util.List&amp;lt;String&amp;gt;&amp;gt; &lt;/pre&gt;<a name="line.848"></a>
<FONT color="green">849</FONT>         *<a name="line.849"></a>
<FONT color="green">850</FONT>         * since &lt;code&gt;List&lt;/code&gt; is a subinterface of &lt;code&gt;Collection&lt;/code&gt;,<a name="line.850"></a>
<FONT color="green">851</FONT>         * this method will return the bounds as if the declaration had been:<a name="line.851"></a>
<FONT color="green">852</FONT>         *<a name="line.852"></a>
<FONT color="green">853</FONT>         * &lt;pre&gt; &amp;lt;K extends java.util.List&amp;lt;String&amp;gt;&amp;gt; &lt;/pre&gt;<a name="line.853"></a>
<FONT color="green">854</FONT>         *<a name="line.854"></a>
<FONT color="green">855</FONT>         * &lt;/p&gt;<a name="line.855"></a>
<FONT color="green">856</FONT>         *<a name="line.856"></a>
<FONT color="green">857</FONT>         * @param bounds an array of types representing the upper bounds of either<a name="line.857"></a>
<FONT color="green">858</FONT>         * &lt;code&gt;WildcardType&lt;/code&gt; or &lt;code&gt;TypeVariable&lt;/code&gt;.<a name="line.858"></a>
<FONT color="green">859</FONT>         * @return an array containing the values from &lt;code&gt;bounds&lt;/code&gt; minus the<a name="line.859"></a>
<FONT color="green">860</FONT>         * redundant types.<a name="line.860"></a>
<FONT color="green">861</FONT>         */<a name="line.861"></a>
<FONT color="green">862</FONT>        public static Type[] normalizeUpperBounds(Type[] bounds) {<a name="line.862"></a>
<FONT color="green">863</FONT>            // don't bother if there's only one (or none) type<a name="line.863"></a>
<FONT color="green">864</FONT>            if (bounds.length &lt; 2) {<a name="line.864"></a>
<FONT color="green">865</FONT>                return bounds;<a name="line.865"></a>
<FONT color="green">866</FONT>            }<a name="line.866"></a>
<FONT color="green">867</FONT>    <a name="line.867"></a>
<FONT color="green">868</FONT>            Set&lt;Type&gt; types = new HashSet&lt;Type&gt;(bounds.length);<a name="line.868"></a>
<FONT color="green">869</FONT>    <a name="line.869"></a>
<FONT color="green">870</FONT>            for (Type type1 : bounds) {<a name="line.870"></a>
<FONT color="green">871</FONT>                boolean subtypeFound = false;<a name="line.871"></a>
<FONT color="green">872</FONT>    <a name="line.872"></a>
<FONT color="green">873</FONT>                for (Type type2 : bounds) {<a name="line.873"></a>
<FONT color="green">874</FONT>                    if (type1 != type2 &amp;&amp; isAssignable(type2, type1, null)) {<a name="line.874"></a>
<FONT color="green">875</FONT>                        subtypeFound = true;<a name="line.875"></a>
<FONT color="green">876</FONT>                        break;<a name="line.876"></a>
<FONT color="green">877</FONT>                    }<a name="line.877"></a>
<FONT color="green">878</FONT>                }<a name="line.878"></a>
<FONT color="green">879</FONT>    <a name="line.879"></a>
<FONT color="green">880</FONT>                if (!subtypeFound) {<a name="line.880"></a>
<FONT color="green">881</FONT>                    types.add(type1);<a name="line.881"></a>
<FONT color="green">882</FONT>                }<a name="line.882"></a>
<FONT color="green">883</FONT>            }<a name="line.883"></a>
<FONT color="green">884</FONT>    <a name="line.884"></a>
<FONT color="green">885</FONT>            return types.toArray(new Type[types.size()]);<a name="line.885"></a>
<FONT color="green">886</FONT>        }<a name="line.886"></a>
<FONT color="green">887</FONT>    <a name="line.887"></a>
<FONT color="green">888</FONT>        /**<a name="line.888"></a>
<FONT color="green">889</FONT>         * &lt;p&gt; Returns an array containing the sole type of {@link Object} if<a name="line.889"></a>
<FONT color="green">890</FONT>         * {@link TypeVariable#getBounds()} returns an empty array. Otherwise, it<a name="line.890"></a>
<FONT color="green">891</FONT>         * returns the result of &lt;code&gt;TypeVariable.getBounds()&lt;/code&gt; passed into<a name="line.891"></a>
<FONT color="green">892</FONT>         * {@link #normalizeUpperBounds}. &lt;/p&gt;<a name="line.892"></a>
<FONT color="green">893</FONT>         *<a name="line.893"></a>
<FONT color="green">894</FONT>         * @param typeVariable the subject type variable<a name="line.894"></a>
<FONT color="green">895</FONT>         * @return a non-empty array containing the bounds of the type variable.<a name="line.895"></a>
<FONT color="green">896</FONT>         */<a name="line.896"></a>
<FONT color="green">897</FONT>        public static Type[] getImplicitBounds(TypeVariable&lt;?&gt; typeVariable) {<a name="line.897"></a>
<FONT color="green">898</FONT>            Type[] bounds = typeVariable.getBounds();<a name="line.898"></a>
<FONT color="green">899</FONT>    <a name="line.899"></a>
<FONT color="green">900</FONT>            return bounds.length == 0 ? new Type[] { Object.class } : normalizeUpperBounds(bounds);<a name="line.900"></a>
<FONT color="green">901</FONT>        }<a name="line.901"></a>
<FONT color="green">902</FONT>    <a name="line.902"></a>
<FONT color="green">903</FONT>        /**<a name="line.903"></a>
<FONT color="green">904</FONT>         * &lt;p&gt; Returns an array containing the sole value of {@link Object} if<a name="line.904"></a>
<FONT color="green">905</FONT>         * {@link WildcardType#getUpperBounds()} returns an empty array. Otherwise,<a name="line.905"></a>
<FONT color="green">906</FONT>         * it returns the result of &lt;code&gt;WildcardType.getUpperBounds()&lt;/code&gt;<a name="line.906"></a>
<FONT color="green">907</FONT>         * passed into {@link #normalizeUpperBounds}. &lt;/p&gt;<a name="line.907"></a>
<FONT color="green">908</FONT>         *<a name="line.908"></a>
<FONT color="green">909</FONT>         * @param wildcardType the subject wildcard type<a name="line.909"></a>
<FONT color="green">910</FONT>         * @return a non-empty array containing the upper bounds of the wildcard<a name="line.910"></a>
<FONT color="green">911</FONT>         * type.<a name="line.911"></a>
<FONT color="green">912</FONT>         */<a name="line.912"></a>
<FONT color="green">913</FONT>        public static Type[] getImplicitUpperBounds(WildcardType wildcardType) {<a name="line.913"></a>
<FONT color="green">914</FONT>            Type[] bounds = wildcardType.getUpperBounds();<a name="line.914"></a>
<FONT color="green">915</FONT>    <a name="line.915"></a>
<FONT color="green">916</FONT>            return bounds.length == 0 ? new Type[] { Object.class } : normalizeUpperBounds(bounds);<a name="line.916"></a>
<FONT color="green">917</FONT>        }<a name="line.917"></a>
<FONT color="green">918</FONT>    <a name="line.918"></a>
<FONT color="green">919</FONT>        /**<a name="line.919"></a>
<FONT color="green">920</FONT>         * &lt;p&gt; Returns an array containing a single value of &lt;code&gt;null&lt;/code&gt; if<a name="line.920"></a>
<FONT color="green">921</FONT>         * {@link WildcardType#getLowerBounds()} returns an empty array. Otherwise,<a name="line.921"></a>
<FONT color="green">922</FONT>         * it returns the result of &lt;code&gt;WildcardType.getLowerBounds()&lt;/code&gt;. &lt;/p&gt;<a name="line.922"></a>
<FONT color="green">923</FONT>         *<a name="line.923"></a>
<FONT color="green">924</FONT>         * @param wildcardType the subject wildcard type<a name="line.924"></a>
<FONT color="green">925</FONT>         * @return a non-empty array containing the lower bounds of the wildcard<a name="line.925"></a>
<FONT color="green">926</FONT>         * type.<a name="line.926"></a>
<FONT color="green">927</FONT>         */<a name="line.927"></a>
<FONT color="green">928</FONT>        public static Type[] getImplicitLowerBounds(WildcardType wildcardType) {<a name="line.928"></a>
<FONT color="green">929</FONT>            Type[] bounds = wildcardType.getLowerBounds();<a name="line.929"></a>
<FONT color="green">930</FONT>    <a name="line.930"></a>
<FONT color="green">931</FONT>            return bounds.length == 0 ? new Type[] { null } : bounds;<a name="line.931"></a>
<FONT color="green">932</FONT>        }<a name="line.932"></a>
<FONT color="green">933</FONT>    <a name="line.933"></a>
<FONT color="green">934</FONT>        /**<a name="line.934"></a>
<FONT color="green">935</FONT>         * &lt;p&gt; Determines whether or not specified types satisfy the bounds of their<a name="line.935"></a>
<FONT color="green">936</FONT>         * mapped type variables. When a type parameter extends another (such as<a name="line.936"></a>
<FONT color="green">937</FONT>         * &lt;code&gt;&lt;T, S extends T&gt;&lt;/code&gt;), uses another as a type parameter (such as<a name="line.937"></a>
<FONT color="green">938</FONT>         * &lt;code&gt;&lt;T, S extends Comparable&lt;T&gt;&lt;/code&gt;), or otherwise depends on<a name="line.938"></a>
<FONT color="green">939</FONT>         * another type variable to be specified, the dependencies must be included<a name="line.939"></a>
<FONT color="green">940</FONT>         * in &lt;code&gt;typeVarAssigns&lt;/code&gt;. &lt;/p&gt;<a name="line.940"></a>
<FONT color="green">941</FONT>         *<a name="line.941"></a>
<FONT color="green">942</FONT>         * @param typeVarAssigns specifies the potential types to be assigned to the<a name="line.942"></a>
<FONT color="green">943</FONT>         * type variables.<a name="line.943"></a>
<FONT color="green">944</FONT>         * @return whether or not the types can be assigned to their respective type<a name="line.944"></a>
<FONT color="green">945</FONT>         * variables.<a name="line.945"></a>
<FONT color="green">946</FONT>         */<a name="line.946"></a>
<FONT color="green">947</FONT>        public static boolean typesSatisfyVariables(Map&lt;TypeVariable&lt;?&gt;, Type&gt; typeVarAssigns) {<a name="line.947"></a>
<FONT color="green">948</FONT>            // all types must be assignable to all the bounds of the their mapped<a name="line.948"></a>
<FONT color="green">949</FONT>            // type variable.<a name="line.949"></a>
<FONT color="green">950</FONT>            for (Map.Entry&lt;TypeVariable&lt;?&gt;, Type&gt; entry : typeVarAssigns.entrySet()) {<a name="line.950"></a>
<FONT color="green">951</FONT>                TypeVariable&lt;?&gt; typeVar = entry.getKey();<a name="line.951"></a>
<FONT color="green">952</FONT>                Type type = entry.getValue();<a name="line.952"></a>
<FONT color="green">953</FONT>    <a name="line.953"></a>
<FONT color="green">954</FONT>                for (Type bound : getImplicitBounds(typeVar)) {<a name="line.954"></a>
<FONT color="green">955</FONT>                    if (!isAssignable(type, substituteTypeVariables(bound, typeVarAssigns),<a name="line.955"></a>
<FONT color="green">956</FONT>                            typeVarAssigns)) {<a name="line.956"></a>
<FONT color="green">957</FONT>                        return false;<a name="line.957"></a>
<FONT color="green">958</FONT>                    }<a name="line.958"></a>
<FONT color="green">959</FONT>                }<a name="line.959"></a>
<FONT color="green">960</FONT>            }<a name="line.960"></a>
<FONT color="green">961</FONT>    <a name="line.961"></a>
<FONT color="green">962</FONT>            return true;<a name="line.962"></a>
<FONT color="green">963</FONT>        }<a name="line.963"></a>
<FONT color="green">964</FONT>    <a name="line.964"></a>
<FONT color="green">965</FONT>        /**<a name="line.965"></a>
<FONT color="green">966</FONT>         * &lt;p&gt; Transforms the passed in type to a {@code Class} object. Type-checking method of convenience. &lt;/p&gt;<a name="line.966"></a>
<FONT color="green">967</FONT>         *<a name="line.967"></a>
<FONT color="green">968</FONT>         * @param parameterizedType the type to be converted<a name="line.968"></a>
<FONT color="green">969</FONT>         * @return the corresponding {@code Class} object<a name="line.969"></a>
<FONT color="green">970</FONT>         * @throws IllegalStateException if the conversion fails<a name="line.970"></a>
<FONT color="green">971</FONT>         */<a name="line.971"></a>
<FONT color="green">972</FONT>        private static Class&lt;?&gt; getRawType(ParameterizedType parameterizedType) {<a name="line.972"></a>
<FONT color="green">973</FONT>            Type rawType = parameterizedType.getRawType();<a name="line.973"></a>
<FONT color="green">974</FONT>    <a name="line.974"></a>
<FONT color="green">975</FONT>            // check if raw type is a Class object<a name="line.975"></a>
<FONT color="green">976</FONT>            // not currently necessary, but since the return type is Type instead of<a name="line.976"></a>
<FONT color="green">977</FONT>            // Class, there's enough reason to believe that future versions of Java<a name="line.977"></a>
<FONT color="green">978</FONT>            // may return other Type implementations. And type-safety checking is<a name="line.978"></a>
<FONT color="green">979</FONT>            // rarely a bad idea.<a name="line.979"></a>
<FONT color="green">980</FONT>            if (!(rawType instanceof Class&lt;?&gt;)) {<a name="line.980"></a>
<FONT color="green">981</FONT>                throw new IllegalStateException("Wait... What!? Type of rawType: " + rawType);<a name="line.981"></a>
<FONT color="green">982</FONT>            }<a name="line.982"></a>
<FONT color="green">983</FONT>    <a name="line.983"></a>
<FONT color="green">984</FONT>            return (Class&lt;?&gt;) rawType;<a name="line.984"></a>
<FONT color="green">985</FONT>        }<a name="line.985"></a>
<FONT color="green">986</FONT>    <a name="line.986"></a>
<FONT color="green">987</FONT>        /**<a name="line.987"></a>
<FONT color="green">988</FONT>         * &lt;p&gt; Get the raw type of a Java type, given its context. Primarily for use<a name="line.988"></a>
<FONT color="green">989</FONT>         * with {@link TypeVariable}s and {@link GenericArrayType}s, or when you do<a name="line.989"></a>
<FONT color="green">990</FONT>         * not know the runtime type of &lt;code&gt;type&lt;/code&gt;: if you know you have a<a name="line.990"></a>
<FONT color="green">991</FONT>         * {@link Class} instance, it is already raw; if you know you have a<a name="line.991"></a>
<FONT color="green">992</FONT>         * {@link ParameterizedType}, its raw type is only a method call away. &lt;/p&gt;<a name="line.992"></a>
<FONT color="green">993</FONT>         *<a name="line.993"></a>
<FONT color="green">994</FONT>         * @param type to resolve<a name="line.994"></a>
<FONT color="green">995</FONT>         * @param assigningType type to be resolved against<a name="line.995"></a>
<FONT color="green">996</FONT>         * @return the resolved &lt;code&gt;Class&lt;/code&gt; object or &lt;code&gt;null&lt;/code&gt; if<a name="line.996"></a>
<FONT color="green">997</FONT>         * the type could not be resolved<a name="line.997"></a>
<FONT color="green">998</FONT>         */<a name="line.998"></a>
<FONT color="green">999</FONT>        public static Class&lt;?&gt; getRawType(Type type, Type assigningType) {<a name="line.999"></a>
<FONT color="green">1000</FONT>            if (type instanceof Class&lt;?&gt;) {<a name="line.1000"></a>
<FONT color="green">1001</FONT>                // it is raw, no problem<a name="line.1001"></a>
<FONT color="green">1002</FONT>                return (Class&lt;?&gt;) type;<a name="line.1002"></a>
<FONT color="green">1003</FONT>            }<a name="line.1003"></a>
<FONT color="green">1004</FONT>    <a name="line.1004"></a>
<FONT color="green">1005</FONT>            if (type instanceof ParameterizedType) {<a name="line.1005"></a>
<FONT color="green">1006</FONT>                // simple enough to get the raw type of a ParameterizedType<a name="line.1006"></a>
<FONT color="green">1007</FONT>                return getRawType((ParameterizedType) type);<a name="line.1007"></a>
<FONT color="green">1008</FONT>            }<a name="line.1008"></a>
<FONT color="green">1009</FONT>    <a name="line.1009"></a>
<FONT color="green">1010</FONT>            if (type instanceof TypeVariable&lt;?&gt;) {<a name="line.1010"></a>
<FONT color="green">1011</FONT>                if (assigningType == null) {<a name="line.1011"></a>
<FONT color="green">1012</FONT>                    return null;<a name="line.1012"></a>
<FONT color="green">1013</FONT>                }<a name="line.1013"></a>
<FONT color="green">1014</FONT>    <a name="line.1014"></a>
<FONT color="green">1015</FONT>                // get the entity declaring this type variable<a name="line.1015"></a>
<FONT color="green">1016</FONT>                Object genericDeclaration = ((TypeVariable&lt;?&gt;) type).getGenericDeclaration();<a name="line.1016"></a>
<FONT color="green">1017</FONT>    <a name="line.1017"></a>
<FONT color="green">1018</FONT>                // can't get the raw type of a method- or constructor-declared type<a name="line.1018"></a>
<FONT color="green">1019</FONT>                // variable<a name="line.1019"></a>
<FONT color="green">1020</FONT>                if (!(genericDeclaration instanceof Class&lt;?&gt;)) {<a name="line.1020"></a>
<FONT color="green">1021</FONT>                    return null;<a name="line.1021"></a>
<FONT color="green">1022</FONT>                }<a name="line.1022"></a>
<FONT color="green">1023</FONT>    <a name="line.1023"></a>
<FONT color="green">1024</FONT>                // get the type arguments for the declaring class/interface based<a name="line.1024"></a>
<FONT color="green">1025</FONT>                // on the enclosing type<a name="line.1025"></a>
<FONT color="green">1026</FONT>                Map&lt;TypeVariable&lt;?&gt;, Type&gt; typeVarAssigns = getTypeArguments(assigningType,<a name="line.1026"></a>
<FONT color="green">1027</FONT>                        (Class&lt;?&gt;) genericDeclaration);<a name="line.1027"></a>
<FONT color="green">1028</FONT>    <a name="line.1028"></a>
<FONT color="green">1029</FONT>                // enclosingType has to be a subclass (or subinterface) of the<a name="line.1029"></a>
<FONT color="green">1030</FONT>                // declaring type<a name="line.1030"></a>
<FONT color="green">1031</FONT>                if (typeVarAssigns == null) {<a name="line.1031"></a>
<FONT color="green">1032</FONT>                    return null;<a name="line.1032"></a>
<FONT color="green">1033</FONT>                }<a name="line.1033"></a>
<FONT color="green">1034</FONT>    <a name="line.1034"></a>
<FONT color="green">1035</FONT>                // get the argument assigned to this type variable<a name="line.1035"></a>
<FONT color="green">1036</FONT>                Type typeArgument = typeVarAssigns.get(type);<a name="line.1036"></a>
<FONT color="green">1037</FONT>    <a name="line.1037"></a>
<FONT color="green">1038</FONT>                if (typeArgument == null) {<a name="line.1038"></a>
<FONT color="green">1039</FONT>                    return null;<a name="line.1039"></a>
<FONT color="green">1040</FONT>                }<a name="line.1040"></a>
<FONT color="green">1041</FONT>    <a name="line.1041"></a>
<FONT color="green">1042</FONT>                // get the argument for this type variable<a name="line.1042"></a>
<FONT color="green">1043</FONT>                return getRawType(typeArgument, assigningType);<a name="line.1043"></a>
<FONT color="green">1044</FONT>            }<a name="line.1044"></a>
<FONT color="green">1045</FONT>    <a name="line.1045"></a>
<FONT color="green">1046</FONT>            if (type instanceof GenericArrayType) {<a name="line.1046"></a>
<FONT color="green">1047</FONT>                // get raw component type<a name="line.1047"></a>
<FONT color="green">1048</FONT>                Class&lt;?&gt; rawComponentType = getRawType(((GenericArrayType) type)<a name="line.1048"></a>
<FONT color="green">1049</FONT>                        .getGenericComponentType(), assigningType);<a name="line.1049"></a>
<FONT color="green">1050</FONT>    <a name="line.1050"></a>
<FONT color="green">1051</FONT>                // create array type from raw component type and return its class<a name="line.1051"></a>
<FONT color="green">1052</FONT>                return Array.newInstance(rawComponentType, 0).getClass();<a name="line.1052"></a>
<FONT color="green">1053</FONT>            }<a name="line.1053"></a>
<FONT color="green">1054</FONT>    <a name="line.1054"></a>
<FONT color="green">1055</FONT>            // (hand-waving) this is not the method you're looking for<a name="line.1055"></a>
<FONT color="green">1056</FONT>            if (type instanceof WildcardType) {<a name="line.1056"></a>
<FONT color="green">1057</FONT>                return null;<a name="line.1057"></a>
<FONT color="green">1058</FONT>            }<a name="line.1058"></a>
<FONT color="green">1059</FONT>    <a name="line.1059"></a>
<FONT color="green">1060</FONT>            throw new IllegalArgumentException("unknown type: " + type);<a name="line.1060"></a>
<FONT color="green">1061</FONT>        }<a name="line.1061"></a>
<FONT color="green">1062</FONT>    <a name="line.1062"></a>
<FONT color="green">1063</FONT>        /**<a name="line.1063"></a>
<FONT color="green">1064</FONT>         * Learn whether the specified type denotes an array type.<a name="line.1064"></a>
<FONT color="green">1065</FONT>         * @param type the type to be checked<a name="line.1065"></a>
<FONT color="green">1066</FONT>         * @return &lt;code&gt;true&lt;/code&gt; if &lt;code&gt;type&lt;/code&gt; is an array class or a {@link GenericArrayType}.<a name="line.1066"></a>
<FONT color="green">1067</FONT>         */<a name="line.1067"></a>
<FONT color="green">1068</FONT>        public static boolean isArrayType(Type type) {<a name="line.1068"></a>
<FONT color="green">1069</FONT>            return type instanceof GenericArrayType || type instanceof Class&lt;?&gt; &amp;&amp; ((Class&lt;?&gt;) type).isArray();<a name="line.1069"></a>
<FONT color="green">1070</FONT>        }<a name="line.1070"></a>
<FONT color="green">1071</FONT>    <a name="line.1071"></a>
<FONT color="green">1072</FONT>        /**<a name="line.1072"></a>
<FONT color="green">1073</FONT>         * Get the array component type of &lt;code&gt;type&lt;/code&gt;.<a name="line.1073"></a>
<FONT color="green">1074</FONT>         * @param type the type to be checked<a name="line.1074"></a>
<FONT color="green">1075</FONT>         * @return component type or null if type is not an array type<a name="line.1075"></a>
<FONT color="green">1076</FONT>         */<a name="line.1076"></a>
<FONT color="green">1077</FONT>        public static Type getArrayComponentType(Type type) {<a name="line.1077"></a>
<FONT color="green">1078</FONT>            if (type instanceof Class&lt;?&gt;) {<a name="line.1078"></a>
<FONT color="green">1079</FONT>                Class&lt;?&gt; clazz = (Class&lt;?&gt;) type;<a name="line.1079"></a>
<FONT color="green">1080</FONT>                return clazz.isArray() ? clazz.getComponentType() : null;<a name="line.1080"></a>
<FONT color="green">1081</FONT>            }<a name="line.1081"></a>
<FONT color="green">1082</FONT>            if (type instanceof GenericArrayType) {<a name="line.1082"></a>
<FONT color="green">1083</FONT>                return ((GenericArrayType) type).getGenericComponentType();<a name="line.1083"></a>
<FONT color="green">1084</FONT>            }<a name="line.1084"></a>
<FONT color="green">1085</FONT>            return null;<a name="line.1085"></a>
<FONT color="green">1086</FONT>        }<a name="line.1086"></a>
<FONT color="green">1087</FONT>    <a name="line.1087"></a>
<FONT color="green">1088</FONT>    }<a name="line.1088"></a>




























































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